MC06XS4200, Dual 24 V, 6.0 mOhm High-side Switch - Data Sheet

Freescale Semiconductor
Advance Information
Document Number: MC06XS4200
Rev. 4.0, 4/2014
Dual 24 V, 6.0 mOhm High-side
Switch
06XS4200
The 06XS4200 device is part of a 24 V dual high-side switch product
family with integrated control and a high number of protective and
diagnostic functions. It has been designed for truck, bus, and industrial
applications. The low RDS(on) channels (<6.0 mOhm) can control
different load types; bulbs, solenoids, or DC motors. Control, device
configuration, and diagnostics are performed through a 16-bit serial
peripheral interface (SPI), allowing easy integration into existing
applications.
Both channels can be controlled individually by external/internal clocksignals or by direct inputs. Using the internal clock allows fully
autonomous device operation. Programmable output voltage slew
rates (individually programmable) help improve EMC performance. To
avoid shutting off the device during inrush current, while still being able
to closely track the load current, a dynamic overcurrent threshold
profile is featured. Switching current of each channel can be sensed
with a programmable sensing ratio. Whenever communication with the
external microcontroller is lost, the device enters a fail-safe operation
mode, but remains operational, controllable, and protected. This device
is powered using SMARTMOS technology.
Features
•
•
•
•
•
•
•
•
•
High-side Switch
FK SUFFIX (PB-FREE)
98ASA00428D
23 PIN PQFN (12 X12 mm)
Two fully-protected 6.0 mOhm (@ 25 °C) high-side switches
Up to 9.0 A steady-state current per channel
Separate bulb and DC motor latched overcurrent handling
Parallel output operating mode with improved switching
synchronization
Individually programmable internal/external PWM clock signals
(switching frequency, duty cycle, slew rate, switch-on time-shift)
Overcurrent, short-circuit, and overtemperature protection with
programmable auto-retry functions
Accurate temperature and current sensing (high/low sensing
ratios/offset compensation)
OpenLoad detection (channel in OFF and ON state), also for LED
applications (7.0 mA typ.)
Normal operating range: 8.0 - 36 V, extended range: 6.0 - 58 V,
3.3 V and 5.0 V compatible 16-bit SPI port for device control,
configuration, and diagnostics at rates up to 8.0 MHz
VDD
VDD
VPWR
06XS4200
I/O
I/O
SCLK
CSB
SI
MCU I/O
SO
I/O
I/O
GND
I/O
A/D
A/D
VDD
VPWR
CLOCK
FSB
SCLK
HS0
CSB
SO
RSTB
SI
HS1
IN0
IN1
CONF0
CONF1
FSOB
SYNC
CSNS
GND
Figure 1. Simplified Application Diagram
*This document contains certain information on a product under development.
Freescale reserves the right to change or discontinue this product without notice
© Freescale Semiconductor, Inc., 2012 - 2014. All rights reserved.
LOAD
M
LOAD
ORDERABLE PARTS
ORDERABLE PARTS
Table 1. Orderable Part Variations
Part Number
Notes
MC06XS4200FK
MC06XS4200BFK
(1)
(1), (2)
Temperature (TA)
-40 to 125 °C
Package
23 PQFN
VPWR (V) Reverse Battery at 25 °C
-28
-32
IOUT_LEAK min (µA) VHS,OFF = VPWR = 24 V
-40
-120
Min
-35
-38
Max
-24
-32
Min
-60
-90
Max
60
90
Min
200.0
135.0
Min
-21
-25
Max
21
25
Min
-41
-50
Max
41
50
Min
46
50
Max
155
160
Min
55
80
Max
280
320
15
-22
VCL (V)
∆t RF_01 (μs)
IOLD(ON) min (mA) CSNS_ratio bit = 0
∆t(DLY) (μs) SR[1:0] = 00
∆t(DLY) (μs) SR[1:0] = 01
SYNC output signal delay for SR[1:0] = 00 (μs)
SYNC output signal delay for SR[1:0] = 01 (μs)
I_LOAD_ERR_SYS (mA) typ
Notes
1. Bit D4 of RETRY_s Serial Input register
MC06XS4200FK = 0
MC06XS4200BFK = CONF_SPI_s
Setting bit D4 to 0 (CONF_SPI_s = 0) will configure the overcurrent profile as the CONF pin.
Setting bit D4 to 1 (CONF_SPI_s = 1) will configure the overcurrent profile as the opposite of CONF pin.
2. The overcurrent profile can be configured through the SPI in the RETRY_s register. If CONF_SPI_s bit is set to 0, the overcurrent profile
is selected on the CONF input pin, otherwise it is the opposite. After device reset, the overcurrent profile is defined by the CONF input
pin. The SPI-SO CONF bit reporting shall combine external hardware configuration and SPI settings.
06XS4200
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VDD
IUP
VPWR
Internal
Regulator
VDD Failure
Detection
POR
Over/Undervoltage
Protections
Charge
Pump
Drain/Gate
Clamp
VREG
CSB
SCLK
Selectable Slew Rate
Gate Driver
IDWN
Selectable Overcurrent
Detection
SO
SI
RSTB
HS0
Severe Short-circuit
Detection
FSB
IN0
Short-circuit to
VPWR detec.
Control
Logic
Overtemperature
Detect.
IN1
FSOB
OpenLoad
Detect
CONF0
CONF1
IUP
IDWN
RDWN
HS0
Calibratable
Oscillator *
CLOCK
HS1
HS1
VREG
PWM
Module
*
Output
Current Sense
Temperature
Feedback
IDWN
Analog MUX
Overtemperature
Prewarning
*blocks marked in grey have been implemented
independently for each of both channels
GND
CSNS
SYNC
Figure 2. Internal Block Diagram
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
TABLE OF CONTENTS
TABLE OF CONTENTS
Orderable Parts
Internal Block Diagram
Pin Connections
Electrical Characteristics
Maximum Ratings
Static Electrical Characteristics
Dynamic Electrical Characteristics
Timing Diagrams
Functional Description
Introduction
Pin Assignment and Functions
Functional Internal Block Description
Functional Device Operation
Operation and Operating Modes
Logic Commands and Spi Registers
Typical Applications
Packaging
Soldering Information
Marking Information
Package Mechanical Dimensions
Revision History
2
3
5
7
7
9
16
22
25
25
25
27
28
28
42
50
52
52
52
52
61
06XS4200
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Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
PIN CONNECTIONS
Transparent Top View
CSNS
IN0
IN1
FSOB
CONF0
CONF1
FSB
CLOCK
RSTB
CSB
SCLK
SI
VDD
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
SO
GND
VPWR
23
22
21
GND
14
SYNC
GND
VPWR
06XS4200
VPWR
15
19
20
HS1
HS0
Figure 3. Device Pin Assignments
Table 2. 06XS4200 Pin Assignments
The function of each pin is described in the section Functional Description
Pin
Number
Pin Name
Function
Formal Name
Definition
1
CSNS
Output
Output Current/
Temperature
Monitoring
This pin either outputs a current proportional to the channel’s output current or
a voltage proportional to the temperature of the GND pin (pin 14). Selection
between current and temperature sensing, as well as setting the current
sensing sensitivity are performed through the SPI interface. An external pulldown resistor must be connected between CSNS and GND.
2
3
IN0
IN1
Input
Direct Inputs
The IN[0 : 1] input pins are used to directly control the switching state of both
switches and consequently the voltage on the HS0 : HS1 output pins. The pins
are connected to GND by internal pull-down resistors
4
FSOB
Output
Fail-safe Output
(Active Low)
FSOB is asserted (active-low) upon entering Fail-safe mode (see Functional
Description) This open-drain output requires an external pull-up resistor to
VPWR
5
CONF0
Input
Configuration Input
6
CONF1
The CONF[0 : 1] input pins are used to select the appropriate overcurrent
detection profile (bulb/DC motor) for each of both channels. CONF requires a
pull-down resistor to GND.
7
FSB
Output
Fault Status
(Active Low)
This open-drain output pin (external pull-up resistor to VDD required) is set
when the device enters Fault mode (see Fault Mode)
8
CLOCK
Input
PWM Clock
The clock input gives the time-base when the device is operated in external
clock/internal PWM mode.
This pin has an internal pull-down current source.
9
RSTB
Input
Reset
10
CSB
Input
Chip Select
(Active Low)
This input pin is used to initialize the device’s configuration - and fault registers.
Reset puts the device in Sleep mode (low current consumption) provided it is
not stimulated by direct input signals.This pin is connected to GND by an
internal pull-down resistor.
This input pin is connected to the SPI chip-select output of an external µcontroller. CSB is internally pulled up to VDD by a current source IUP.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
PIN CONNECTIONS
Table 2. 06XS4200 Pin Assignments (continued)
The function of each pin is described in the section Functional Description
Pin
Number
Pin Name
Function
Formal Name
Definition
11
SCLK
Input
Serial Clock
This input pin is to be connected to an external SPI Clock signal. The SCLK
pin is internally connected to a pull-down current source IDWN
12
SI
Input
Serial Input
This input pin receives the SPI input data from an external device
(microcontroller or another extreme switch device in case of daisy-chaining).
The SI pin is internally connected to a pull-down current source IDWN
13
VDD
Power
Digital Drain Voltage
16
SO
Output
Serial Output
This output pin transmits SPI data to an external device (external
microcontroller or the SI pin of the next SPI device in case of daisy-chaining).
The pin doesn’t require external pull-up or pull-down resistors, but a series
resistor is recommended to limit current consumption in case of GND
disconnection
14, 17, 22
GND
Ground
Ground
These pins, internally connected, are the ground pins for the logic - and analog
circuitry. It is recommended to also connect these pins on the PCB.
15,18,21
VPWR
Power
Positive Power Supply These pins, internally connected, supply both the device’s power and control
circuitry (except the SPI port). The drain of both internal MOSFET switches is
connected to them. Pin 15 is the device’s primary thermal pad.
19
20
HS1
HS0
Output
Power Switch Outputs
23
SYNC
Output
Output Current
Monitoring
Synchronization
This is the positive supply pin of the SPI interface.
Output pins of the switches, to be connected to the load.
This output pin is asserted (active low) when the Current Sense (CS) output
signal is within the specified accuracy range. Reading the SYNC pin allows the
external microprocessor to synchronize to the device when operating in
autonomous operating mode. SYNC is open-drain and requires a pull-up
resistor to VDD.
06XS4200
6
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 3. Maximum Ratings
All voltages are relative to ground unless mentioned otherwise. Exceeding these ratings may cause permanent damage.
Parameter
Symbol
Maximum ratings
Unit
ELECTRICAL RATINGS
VPWR Supply Voltage Range
VPWR
Load Dump at 25 °C (500 ms)
V
58
Reverse Battery at 25 °C
06XS4200
-28
06XS4200B
-32
Fast Negative Transient Pulses (ISO 7637-2 pulse #1, VPWR = 14 V & Ri =
10 Ohm)
VDD Supply Voltage Range
-60
VDD
-0.3 to 5.5
V
VMAX,LOGIC(3)
-0.3 to 5.5
V
Voltage on Fail-safe Output (FSOB)
VFSO
-0.3 to 58
V
Voltage on SO pin
VSO
-0.3 to VDD+0.3
V
Voltage (continuous, max. allowable) on IN[0:1] Inputs
VIN,MAX
58
V
Voltage (continuous, max. allowable) on output pins (HS [0:1])
VHS[0:1]
Voltage on Input
pins(3)
(except IN[0:1]) and Output
pins(4)(except
HS[0:1])
06XS4200
06XS4200B
Rated Continuous Output Current per
V
-28 to 58
-32 to 58
channel(5)
Maximum allowable energy dissipation per channel and two parallel channels,
single-pulse method(6)
IHS[0:1]
ECL [0:1]_SING
9.0
A
mJ
250
ESD Voltage(7)
V
Human Body Model (HBM) for HS[0:1], VPWR and GND
VESD1
± 8000
Human Body Model (HBM) for other pins
VESD2
± 2000
Package Corner pins (1, 13, 19, 20)
VESD3
± 750
All Other pins
VESD4
± 500
Charge Device Model (CDM)
Notes:
3. Concerned Input pins are: CONF[0:1], RSTB, SI, SCLK, Clock, and CSB.
4. Concerned Output pins are: CSNS, SYNC, and FSB.
5. Output current rating valid as long as maximum junction temperature is not exceeded. For computation of the maximum allowable output
current, the thermal resistance of the package & the underlying heatsink must be taken into account
6. Single pulse Energy dissipation, Single-pulse short-circuit method (LL = 0.5 mH, R = 48 mOhm, VPWR = 28 V, TJ = 150 °C initial).
7.
ESD testing is performed in accordance with the Human Body Model (HBM) (CZAP = 100 pF, RZAP = 1500 Ohm), and the Charge Device
Model (CDM), Robotic (CZAP = 4.0 pF).
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
7
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 3. Maximum Ratings (continued)
All voltages are relative to ground unless mentioned otherwise. Exceeding these ratings may cause permanent damage.
Parameter
Symbol
Maximum ratings
Unit
THERMAL RATINGS
°C
Operating Temperature
Ambient
TA
- 40 to 125
Junction
TJ
- 40 to 150
TSTG
- 55 to 150
°C
RθJC
<1.0
°C/ W
TSOLDER
260
°C
Storage Temperature
Thermal Resistance / Junction to Case
Reflow Peak Temperature on device pins during
soldering(8), (9)
Notes:
8. 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent
damage to the device. MSL level is specified later.
9. Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020. For Peak Package Reflow
Temperature and Moisture Sensitivity Levels (MSL), Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes
and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics.
06XS4200
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Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
Unit
Full Specification compliant
8.0
24
36
V
Extended Mode(10)
6.0
–
58
–
6.5
8.0
SUPPLY ELECTRICAL CHARACTERISTICS
Supply Voltage Range:
VPWR
VPWR Supply Current, device in wake-up mode, channel On, OpenLoad
IPWR(ON)
Outputs in ON-state, HS[0 : 1] open, IN[0:1] > VIH
VPWR Supply Current, device in wake-up mode (Standby), channel Off
IPWR(SBY)
OpenLoad in OFF-state Detection Disabled, HS[0 : 1] shorted to
ground with VDD = 5.5 V and RSTB > VWAKE
Sleep State Supply Current
mA
mA
–
6.5
8.0
μA
IPWR(SLEEP)
VPWR = 24 V, RSTB = IN[0:1] < VWAKE, HS[0 : 1] connected to ground
TA = 25 °C
–
3.0
10.0
TA = 125 °C
–
–
60.0
3.0
–
5.5
No SPI Communication
–
–
2.2
8.0 MHz SPI Communication(11)
–
5.0
–
VDD Supply Voltage
VDD(ON)
VDD Supply Current at VDD = 5.5 V
IDD(ON)
V
mA
VDD Sleep State Current at VDD = 5.5 V with or without VPWR
IDD(SLEEP)
–
–
5.0
μA
Overvoltage Shutdown Threshold
VPWR(OV)
39
42
45.5
V
Overvoltage Shutdown Hysteresis
VPWR(OVHYS)
0.2
0.8
1.5
V
VPWR(UV)
5.0
–
6.0
V
VPWR(POR)
2.2
2.6
4.0
V
VDD(POR)
1.5
2.0
2.5
V
VDD(FAIL)
2.2
2.5
2.8
V
Undervoltage Shutdown
Threshold(12)
VPWR Power-On-Reset (POR) Voltage
Threshold(12)
VDD Power-On-Reset (POR) Voltage Threshold
(12)
VDD Supply Failure Voltage Threshold (assumed VPWR > VPWR(UV))
Notes
10. In extended mode, availability of several device functions (channel control, value of RDS(ON), overtemperature protection) is guaranteed,
but compliance with the specified values in this document is not. Below 6.0 V, the device is only protected from overheating (thermal
shutdown). Above VPWR(OV), the channels can only be turned ON when the overvoltage detection function has been disabled.
11.
12.
Typical value guaranteed per design.
When the device recovers from undervoltage and returns to normal mode (6.0 V < VPWR < 58 V) before the end of the auto-retry period
(see Auto-retry), the device performs normally. When VPWR drops below VPWR(UV), undervoltage is detected (see Undervoltage Fault
(Latchable Fault) and EMC Performances).
06XS4200
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Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
Unit
VPWR = 8.0 V
–
–
6.0
mΩ
VPWR = 28 V
–
–
6.0
VPWR = 36 V
–
–
6.0
VPWR = 8.0 V
–
–
12
VPWR = 28 V
–
–
12
VPWR = 36 V
–
–
12
-0.7
–
+0.7
mΩ
–
–
12
mΩ
cm
ELECTRICAL CHARACTERISTICS OF THE OUTPUT STAGE (HS0 AND HS1)
ON-Resistance, Drain-to-Source (IHS = 3.0 A, TJ = 25 °C)
CSNS_ratio = 0
ON-Resistance, Drain-to-Source (IHS = 3.0 A,TJ = 150 °C)
CSNS_ratio = 0
RDS(ON)25
RDS(ON)150
ON-Resistance, Drain-to-Source difference from one channel to the other
in parallel mode (IHS = 1.0 A,TJ = 150 °C) CSNS_ratio = X
ΔRDS(ON)150
ON-Resistance, Source-Drain (IHS = -3.0 A, TJ = 150 °C, VPWR = -24 V)
RSD(ON)150
Max. detectable wiring length (2.5 mm²) for severe short-circuit detection
(see Severe Short-circuit Fault (latchable fault)):
LSHORT
High slew rate selected
14
48
80
30
100
170
60
200
340
I_OCH1_0
90.0
110.0
128.3
I_OCH2_0
58.3
70.0
81.7
I_OCM1_0
36.1
43.3
50.6
I_OCM2_0
22.2
26.7
31.1
I_OCL1_0
15.0
18.0
21.0
I_OCL2_0
10.0
12.0
14.0
I_OCL3_0
5.0
6.0
7.0
I_OCH1_1
30.6
36.7
42.8
I_OCH2_1
19.4
23.3
27.2
I_OCM1_1
12.0
14.4
16.9
I_OCM2_1
7.4
8.9
10.4
I_OCL1_1
5.0
6.0
7.0
I_OCL2_1
3.3
4.0
4.7
I_OCL3_1
1.6
2.0
2.4
Medium slew rate selected:
Low slew rate selected:
Overcurrent Detection thresholds with CSNS_ratio bit = 0 (CSR0)
Overcurrent Detection thresholds with CSNS_ratio bit = 1(CSR1)
Output (HS[x]) leakage Current in sleep state (positive value = outgoing)
IOUT_LEAK
mΩ
A
A
µA
06XS4200
VHS,OFF = 0 V (VHS,OFF = output voltage in OFF state)
VHS,OFF = VPWR, device in sleep state (VPWR = 24 V)
–
–
+16
-40.0
–
+5.0
–
-120
-1400
–
–
–
+16
+5.0
+5.0
06XS4200B
VHS,OFF = 0 V (VHS,OFF = output voltage in OFF state)
VHS,OFF = VPWR, device in sleep state (VPWR = 24 V)
VHS,OFF = VPWR, device in sleep state (VPWR = 36 V)
06XS4200
10
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
Unit
ELECTRICAL CHARACTERISTICS OF THE OUTPUT STAGE (HS0 AND HS1) (CONTINUED)
Output biasing current in off-state (positive value = outgoing)
06XS4200B
with OL_OFF disabled (worst case VPWR = 36 V, VHS,OFF = 34 V)
IOUT_OFF
Fast slew rate selected
Medium slew rate selected
Slow slew rate selected
With OL_OFF disabled and ECU ground disconnected (VPWR = 32 V)
µA
-770
-520
-390
0.0
-620
-420
-315
–
-460
-310
-240
1000
VD_GND(CLAMP)
58
–
66
V
VDS(CLAMP)
58
–
66
V
-2.0
–
+2.0
V
CSR0
–
1/5000
–
CSR1
–
1/1666.6
–
I_LOAD_MIN
–
–
175
mA
ICSR_LEAK
-4.0
–
+4.0
µA
06XS4200
–
15
–
06XS4200B
–
-22
–
I_LOAD_ERR_RAND
-360
–
360
mA
ICSNS,MAX
5.15
–
–
mA
Switch Turn-on threshold for supply overvoltage (VPWR -GND)
Switch turn-on threshold for drain-source overvoltage (@ IHS = 100 mA)
Switch turn-on threshold for Drain-Source overvoltage difference from
one channel to the other in parallel mode (@ IHS = 100 mA)
ΔVDS(CLAMP)
Current Sensing Ratio(13)
–
CSNS_ratio bit = 0 (high-current mode)
CSNS_ratio bit = 1 (low-current mode)
Minimum measurable load current with compensated error
(14)
< 35%
CSNS leakage current in OFF state (CSNSx_en = 0, CSNS_ratio
bit_x = 0)
Systematic offset error (see Current Sense Errors)
I_LOAD_ERR_SYS
Random offset error
CSNS pin current sourcing capability, absolute upper limit
uncompensated(15))
ESR0 Output Current Sensing Error (%,
Current level (Sense ratio CSR0 selected):
at output
mA
ESR0_ERR
%
TJ = -40 °C
9.0 A
-13
–
13
4.5 A
-12
–
12
2.25 A
-17
–
17
1.13 A
-31
–
31
9.0 A
-10
–
10
4.5 A
-9.0
–
9.0
2.25 A
-12
–
12
1.13 A
-19
–
19
TJ = 125 °C
TJ = 25 to 125 °C
9.0 A
4.5 A
2.25 A
1.13 A
-10
–
10
-9.0
–
9.0
-12
–
12
-22
–
22
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
11
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
Unit
ELECTRICAL CHARACTERISTICS OF THE OUTPUT STAGE (HS0 AND HS1) (CONTINUED)
ESR0 Output Current Sensing Error (%, after offset compensation(14)) at ESR0_ERR(Comp)
output Current level (Sense ratio CSR0 selected):
%
TJ = -40 °C
9.0 A
-10
–
10
4.5 A
-10
–
10
2.25 A
-10
–
10
1.13 A
-10
–
10
9.0 A
-9.0
–
9.0
4.5 A
-8.0
–
8.0
2.25 A
-9.0
–
9.0
1.13 A
-9.0
–
9.0
-9.0
–
9.0
-8.0
–
8.0
-9.0
–
9.0
-9.0
–
9.0
-16
–
16
-12
–
12
-12
–
12
TJ = 125 °C
TJ = 25 to 125 °C
9.0 A
4.5 A
2.25 A
1.13 A
ESR1 Output Current Sensing Error (%, uncompensated (15)) at output
Current level (Sense ratio CSR1 selected):
ESR1_ERR
TJ = -40 °C
2.25 A
%
TJ = 125 °C
2.25 A
TJ = 25 to 125 °C
2.25 A
Notes:
13. Current Sense Ratio CSRX = ICSNS / (IHS[x] + I_LOAD_ERR_SYS)
14.
15.
See note (15), but with ICSNS_MEAS obtained after compensation of I_LOAD_ERR_RAND (see Activation and Use of Offset Compensation).
Further accuracy improvements can be obtained by performing a 1 or 2 point calibration
ESRX_ERR = (ICSNS_MEAS / ICSNS_MODEL) - 1, with ICSNS_MODEL = (I(HS[x]) + I_LOAD_ERR_SYS) * CSRX , (I_LOAD_ERR_SYS defined above,
see section Current Sense Error Model). With this model, load current becomes: I(HS[x]) = ICSNS / CSRX - I_LOAD_ERR_SYS
06XS4200
12
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
Unit
ELECTRICAL CHARACTERISTICS OF THE OUTPUT STAGE (HS0 AND HS1) (CONTINUED)
ESR1 Output Current Sensing Error (% after offset compensation(16)) at
output Current level (Sense ratio CSR1 selected):
ESR1_ERR(Comp)
%
TJ = -40 °C
2.25 A
-10
–
10
0.75 A
-11
–
11
0.375 A
-18
–
18
0.225 A
-29
–
29
2.25 A
-8.0
–
8.0
0.75 A
-10
–
10
0.375 A
-12
–
12
0.225 A
-16
–
16
-8.0
–
8.0
-10
–
10
-13
–
13
-21
–
21
TJ = 125 °C
TJ = 25 to 125 °C
2.25 A
0.75 A
0.375 A
0.225 A
ESR0 Output Current Sensing Error in parallel mode (%,
uncompensated(17)) at outputs Current level (Sense ratio CSR0 selected):
ESR0_ERR_PAR
%
TJ = -40 °C
9.0 A
-10
–
10
4.5 A
-11
–
11
9.0 A
-8.0
–
8.0
4.5 A
-8.0
–
8.0
-8.0
–
8.0
-8.0
–
8.0
VCL(CSNS)
5.5
–
7.5
V
IOLD(OFF)
30
–
100
μA
VOLD(THRES)
4.0
–
5.5
V
TJ = 125 °C
TJ = 25 to 125 °C
9.0 A
4.5 A
Current Sense Clamping Voltage (condition: R(CSNS) > 10 kOhm)
OpenLoad detection Current threshold in OFF state
OpenLoad Fault Detection Voltage Threshold
(18)
(18)
Notes:
16.
17.
18.
See note (17), but with ICSNS_MEAS obtained after compensation of I_LOAD_ERR_RAND (see Activation and Use of Offset Compensation).
Further accuracy improvements can be obtained by performing a 1 or 2 point calibration.
ESRX_ERR = (ICSNS_MEAS / ICSNS_MODEL) -1, with ICSNS_MODEL = (I(HS[x])+ I_LOAD_ERR_SYS) * CSRX , (I_LOAD_ERR_SYS defined above,
see section Current Sense Error Model). With this model, load current becomes: I(HS[x]) = ICSNS / CSRX - I_LOAD_ERR_SYS
Minimum required value of OpenLoad impedance for detection of OpenLoad in OFF-state: 200 kΩ.(VOLD(THRES) = VHS @ IOLD(OFF))
06XS4200
13
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
Unit
ELECTRICAL CHARACTERISTICS OF THE OUTPUT STAGE (HS0 AND HS1) (CONTINUED)
OpenLoad detection Current threshold in ON state (see OpenLoad
Detection In On State (OL_ON)):
IOLD(ON)
mA
CSNS_ratio bit = 0
06XS4200
200.0
500.0
999.9
06XS4200B
135.0
500.0
999.9
5.0
7.0
10
tOLLED
105
150
195
ms
VOSD(THRES)
VPWR-1.2
VPWR-0.8
VPWR-0.4
V
CSNS_ratio bit = 1 (fast slew rate SR[1:0] = 10 mandatory for this
function)
Time period of the periodically activated OpenLoad in ON state detection
for CSNS_ratio bit = 1
Output Shorted-to-VPWR Detection Voltage Threshold (channel in OFF
state)
Switch turn-on threshold for Negative Output Voltages (protects against
negative transients) - (measured at IOUT = 100 mA, Channel in OFF state)
VCL
V
06XS4200
-35
–
-24
06XS4200B
-38
–
-32
-2.0
–
+2.0
V
VHS_TH
0.45*VPWR
0.5*VPWR
0.55*VPWR
V
TSD
160
175
190
°C
VIH
2.0
–
5.5
V
VIL
-0.3
–
0.8
V
VWAKE
1.0
–
2.2
V
IDWN
5.0
–
20
μA
IUP_CSB
5.0
–
20
μA
IUP_CONF
25
–
100
μA
CSO
–
–
20
pF
RDWN
125
250
500
kΩ
CIN
–
4.0
12
pF
Switch turn-on threshold for Negative Output Voltages difference from
one channel to the other in parallel mode - (measured at IOUT = 100 mA,
Channel in OFF state)
Switching State (On/Off) discrimination thresholds
Shutdown temperature (Power MOSFET junction; 6.0 V < VPWR < 58 V)
ΔVCL
ELECTRICAL CHARACTERISTICS OF THE CONTROL INTERFACE PINS
Logic Input Voltage, High(19)
Logic Input Voltage, Low
(19)
Wake-up Threshold Voltage (IN[0:1] and
RSTB)(20)
Internal Pull-down Current Source (on Inputs: CLOCK, SCLK and
Internal Pull-up Current Source (input CSB)
SI)(21)
(22)
Internal Pull-up Current Source (input CONF[0:1])
(23)
Capacitance of SO, FSB and FSOB pins in Tri-state
Internal Pull-down Resistance (RSTB and IN[0:1])
Input Capacitance
(24)
Notes
19. High and low voltage ranges apply to SI, CSB, SCLK, RSTB, IN[0:1] and CLOCK input signals. The IN[0:1] signals may be derived from
VPWR and can tolerate voltages up to 58 V.
20.
21.
Voltage above which the device wakes up
Valid for VSI > 0.8 V and VSCLK > 0.8 V and VCLOCK > 0.8 V.
22.
Valid for VCSB < 2.0 V. CSB has an internal pull-up current source derived from VDD
23.
Pins CONF[0:1] are connected to an internal current source, derived from an internal voltage regulator (VREG ~ 3.0 V).
24.
Input capacitance of SI, CSB, SCLK, RSTB, IN[0:1], CONF[0:1], and CLOCK pins. This parameter is guaranteed by the manufacturing
process but is not tested in production.
06XS4200
14
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C, VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
parameter
Symbol
Min
Typ
Max
VDD-0.4
–
–
–
–
0.4
Unit
ELECTRICAL CHARACTERISTICS OF THE CONTROL INTERFACE PINS (CONTINUED)
SO High-state Output Voltage
VSOH
(IOH = 1.0 mA)
SYNC, SO, FSOB and FSB Low-state Output Voltage
VSOL
(IOL = -1.0 mA)
SYNC, SO, CSNS, FSOB and FSB Tri-state Leakage Current:
V
μA
ISO(LEAK)
(0 V < V(SO) < VDD, or V(FS) or V(SYNC) = 5.5 V, or V(FSO) = 36 V
or V(CSNS) = 0 V)
CONF[0:1]: Required values of the External Pull-down Resistor
V
- 2.0
0
2.0
RCONF
kΩ
Lighting applications
1.0
–
10
DC motor applications
50
–
Infinite
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
15
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C,VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
Parameter
Symbol
Min
Typ
Max
0.164
–
0.65
VPWR = 28 V
0.28
–
0.79
VPWR = 36 V
0.34
–
0.90
0.081
–
0.32
0.14
–
0.395
0.17
–
0.45
Unit
OUTPUT VOLTAGE SWITCHING CHARACTERISTICS
Rising and falling edge medium slew rate (SR[1:0] = 00)(25)
SRR_00
VPWR = 16 V
SRF_00
Rising edge low slew rate (SR[1:0] = 01)(25)
SRR_01
VPWR = 16 V
SRF_01
VPWR = 28 V
VPWR = 36 V
Rising edge high slew rate / SR[1:0] =
V/μs
10)(25)
V/μs
SRR_10
VPWR = 16 V
SRF_10
V/μs
0.29
–
1.30
VPWR = 28 V
0.55
–
1.58
VPWR = 36 V
0.68
–
1.80
0.75
–
1.2
Rising/Falling edge slew rate matching per channel
SRR/SRF
16 V < VPWR < 36 V
Edge slew rate difference from one channel to the other in parallel mode
(25)
ΔSR
16 V < VPWR < 36 V
V/μs
SR[1:0] = 00
-0.1
0.0
+0.1
SR[1:0] = 01
-0.06
0.0
+0.06
-0.14
0.0
+0.14
39
-
145
50
-
280
22
-
80
-25
0.0
25
SR[1:0] = 10
Output Turn-ON and Turn-OFF Delays (medium slew rate: SR[1:0] = 00)
(26)
Output Turn-ON and Turn-OFF Delays (low slew rate / SR[1:0] = 01)(26)
Δ t RF_00
f PWM = 400 Hz, 16 V < VPWR < 36 V, duty cycle on IN[x] = 50 %, SR[1:0] = 00
Turn-ON and Turn-OFF Delay time matching per channel (t DLY(ON) - t DLY(OFF))
μs
t DLY_10
16 V < VPWR < 36 V
Turn-ON and Turn-OFF Delay time matching per channel (t DLY(ON) - t DLY(OFF))
μs
t DLY_01
16 V < VPWR < 36 V
Output Turn-ON and Turn-OFF Delays (high slew rate / SR[1:0] = 10)(26)
μs
t DLY_00
16 V < VPWR < 36 V
μs
Δ t RF_01
μs
f PWM = 200 Hz, 16 V < VPWR < 36 V, duty cycle on IN[x] = 50 %, SR[1:0] = 01
06XS4200
-60
0.0
60
06XS4200B
-90
0.0
90
Notes
25. Rising and Falling edge slew rates specified for a 20% to 80% voltage variation on a 10.0 Ω resistive load (see Figure 4).
26. Turn-on delay time measured as delay between a rising edge of the channel control signal (IN[0 : 1] = 1) and the associated rising edge
of the output voltage up to: VHS[0 : 1] = VPWR / 2 (where RL = 5.0 Ω). Turn-OFF delay time is measured as time between a falling edge of
the channel control signal (IN[0 : 1] = 0) and the associated falling edge of the output voltage up to the instant at which: VHS[0 : 1] = VPWR /
2 (RL = 10.0 Ohm.
06XS4200
16
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C,VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
Parameter
Symbol
Min
Typ
Max
-13
0.0
13
Unit
SWITCHING CHARACTERISTICS (CONTINUED)
Turn-ON and Turn-OFF Delay time matching per channel (t DLY(ON) - t DLY(OFF))
Δ t RF_10
f PWM = 1.0 kHz, 16 V < VPWR < 36 V, duty cycle on IN[x] = 50 %,
SR[1:0] = 10
Delay time difference from one channel to the other in parallel mode(27)
μs
Δ t(DLY)
16 V < VPWR < 36 V
μs
SR[1:0] = 00
06XS4200
-21
0.0
21
06XS4200B
-25
0.0
25
06XS4200
-41
0.0
41
06XS4200B
-50
0.0
50
-12
0.0
12
tFAULT
–
5.0
8.0
μs
tDETECT
–
12.0
17
μs
0.0
-
200
0.0
-
315
0.0
-
165
46
-
155
50
-
160
55
-
280
SR[1:0] = 01
SR[1:0] = 10
(28)
Fault Detection Delay Time
(29)
Output Shutdown Delay Time
Current sense output settling Time for SR[1:0] = 00 (medium slew rate)
(30)
Current sense output settling Time for SR[1:0] = 01(low slew rate)(30)
Current sense output settling Time for SR[1:0] = 10 (high slew rate)(30)
SYNC output signal delay for SR[1:0] = 00 (medium SR) (30)
μs
t SYNCVAL_00
06XS4200
06XS4200B
SR)(30)
μs
t SYNCVAL_01
06XS4200
06XS4200B
SYNC output signal delay for SR[1:0] = 10 (high SR) (30)
Recommended sync_to_read delay SR[1:0] = 00 (medium slew rate)
(30)
Recommended sync_to_read delay SR[1:0] = 10 (high slew rate) (30)
Upper overcurrent threshold duration
μs
t CSNSVAL_10
16 V < VPWR < 36 V
Recommended sync_to_read delay SR[1:0] = 01 (low slew rate)
μs
t CSNSVAL_01
16 V < VPWR < 36 V
SYNC output signal delay for SR[1:0] = 01 (low
μs
t CSNSVAL_00
16 V < VPWR < 36 V
(30)
80
-
320
t SYNCVAL_10
22
-
80
μs
t SYNREAD_00
0.0
-
200
µs
t SYNREAD_01
0.0
-
200
µs
t SYNREAD_10
0.0
-
200
µs
tOCH1
6.0
8.6
11.2
ms
tOCH2
12.0
17.2
22.4
Notes:
27. Rising and Falling edge slew rates specified for a 20% to 80% voltage variation on a 10.0 Ω resistive load (see Figure 4).
28. Time required to detect and report the fault to the FSB pin.
29. Time required to switch off the channel after detection of overtemperature (OT), overcurrent (OC), SC or UV error (time measured
between start of the negative edge on the FSB pin and the falling edge on the output voltage until V(HS[0:1)) = 50% of VPWR
30.
Settling time ( = t CSNSVAL_XX), SYNC output signal delay ( = t SYNCVAL_XX) and Read-out delay ( = t SYNREAD_XX) are defined for a
stepped load current (100 mA< I(LOAD)<IOCLX A FOR CSNS_RATIO_S = 1, AND 300 mA< I(LOAD)<IOCLX A_0 FOR CSNS_RATIO_S = 0).
(see Figure 9 and Output Current Monitoring (CSNS)).
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
17
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C,VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
Parameter
Symbol
Min
Typ
Max
Unit
tOCM1_L
48
tOCM2_L
96
67
87
ms
137
178
tOCM1_M
150
214
278
tOCM2_M
301
429
557
SWITCHING CHARACTERISTICS (CONTINUED)
Medium overcurrent threshold duration (CONF = 0; Lighting Profile)
Medium overcurrent threshold duration (CONF = 1; DC motor Profile)
ms
FREQUENCY & PWM DUTY CYCLE RANGES (31)(protections fully operational, see Protective Functions)
Switching Frequency range - Direct Inputs
fCONTROL
0.0
–
1000
Hz
Switching Frequency range - External clock with internal PWM (recommended)
fPWM_EXT
20
–
1000
Hz
fPWM_INT
60
–
1000
Hz
RCONTROL
0.0
–
100
%
Switching Frequency range - Internal clock with internal PWM (recommended)
Duty Cycle range
Notes:
31. In Direct Input mode, the lower frequency limit is 0 Hz with RSTB = 5.0 V and 4.0 Hz with RSTB = 0 V. Duty-cycle applies to instants at
which VHS = 50 % VPWR. For low duty-cycle values, the effective value also depends on the value of the selected slew rate.
06XS4200
18
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C,VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
Parameter
Symbol
Min
Typ
Max
Unit
AVAILABILITY DIAGNOSTIC FUNCTIONS OVER DUTY-CYCLE AND SWITCHING FREQUENCY
(PROTECTIONS & DIAGNOSTICS BOTH FULLY OPERATIONAL, SEE DIAGNOSTIC FEATURES FOR THE EXACT BOUNDARY VALUES)
Available Duty Cycle Range, fPWM = 1.0 kHz high slew rate, PWM mode(32)
RPWM_1K_H
%
OL_OFF
0.0
–
62
OL_ON
35
–
100
0.0
–
90
OS
Available Duty Cycle Range, fPWM = 400 Hz, medium slew rate, PWM mode(32)
RPWM_400_M
%
OL_OFF
0.0
–
81
OL_ON
21
–
100
0.0
–
88
OL_OFF
0.0
–
84
OL_ON
14
–
100
0.0
–
95
OS
Available Duty Cycle Range, fPWM = 400 Hz, high slew rate, PWM
mode(32)
RPWM_400_H
OS
%
Available Duty Cycle Range, fPWM = 200 Hz, low slew rate mode, PWM mode(32) RPWM_200_L
%
OL_OFF
0.0
–
86
OL_ON
15
–
100
0.0
–
93
OL_OFF
0.0
–
90
OL_ON
11
–
100
0.0
–
94
OS
Available Duty Cycle Range, fPWM = 200 Hz, medium slew rate, PWM
mode(32)
RPWM_200_M
OS
Available Duty Cycle Range, fPWM = 100 Hz in low slew rate, PWM mode(32)
%
RPWM_100_L
%
OL_OFF
0.0
–
93
OL_ON
8.0
–
100
0.0
–
96
AFPWM(CAL)
-10
–
+10
%
OS
Deviation of the internal clock PWM frequency after
Calibration(33)
Default output frequency when using an uncalibrated oscillator
fPWM(0)
280
400
520
Hz
Minimal required Low Time during Calibration of the Internal Clock through CSB
t CSB(MIN)
1.0
1.5
2.0
μs
Maximal allowed Low Time during Calibration of the Internal Clock through CSB
t CSB(MAX)
70
100
130
μs
Recommended external Clock Frequency Range (external clock/PWM Module)
fCLOCK
15
–
512
kHz
Upper detection threshold for external clock frequency monitoring
f CLOCK(MAX)
512
730
930
kHz
Lower detection threshold for external clock frequency monitoring
f CLOCK(MIN)
5.0
7.0
10
kHz
Notes
32. Actually, the device can be operated outside the specified duty cycle and frequency ranges (basic protective functions OC, SC, UV, OV,
OT remain active) but the availability of the diagnostic functions OL_ON, OL_OFF, OS is affected.
33. Values guaranteed from 60 Hz to 1.0 kHz (recommended switching frequency range for internal clock operation).
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
19
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C,VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
Parameter
Symbol
Min
Typ
Max
Unit
tIN
175
250
325
ms
t WDTO
217
310
400
ms
tAUTO_00
tAUTO_01
tAUTO_10
tAUTO_11
105
52.5
26.2
13.1
150
75
37.5
17.7
195
97.5
47.8
24.4
TOTWAR
110
125
140
°C
TFEED
918
1078
1238
mV
DTFEED
10.7
11.1
11.5
mV/°C
TFEED_ERROR
-15
–
+15
°C
Temperature Sensing Error, [-40 °C, 150 °C] after 1 point calibration @ 25 °C(35) TFEED_ERROR_
-5.0
–
+5.0
°C
TIMING: SPI PORT, IN[0]/ IN[1] SIGNALS & AUTORETRY
Required Low time allowing delatching or triggering sleep mode (direct input mode)
Watchdog Timeout for entering Fail-safe Mode due to loss of SPI contact
(34)
Auto-Retry Repetition Period (when activated):
ms
Auto_period bits = 00
Auto_period bits = 01
Auto_period bits = 10
Auto_period bits = 11
GND PIN TEMPERATURE SENSING FUNCTION
Thermal Prewarning Detection Threshold(35)
Temperature Sensing output voltage @ TA = 25 °C (470 Ω < RCSNS < 10 kΩ)
Gain Temperature Sensing output @ TA = 25 °C (470 Ω < RCSNS < 10 kΩ)
Temperature Sensing Error, range [-40 °C, 150 °C], default(35)
(35)
CAL
Notes
34. Only when the WD_dis bit set to logic [0] (default). Watchdog timeout defined from the rising edge on RST to rising edge HS[0,1]
35. Values were obtained by lab characterization.
06XS4200
20
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics (continued)
Unless specified otherwise: 8.0 V ≤ VPWR ≤ 36 V, 3.0 V ≤ VDD ≤ 5.5 V, - 40 °C ≤ TA ≤ 125 °C, GND = 0 V. Typical values are
average values evaluated under nominal conditions TA = 25 °C,VPWR = 28 V & VDD = 5.0 V, unless specified otherwise.
Parameter
Symbol
Min
Typ
Max
Unit
f SPI
–
–
8.0
MHz
t WRSTB
10
–
–
μs
Required duration from the Rising to the Falling Edge of CSB (Required Setup
Time)(39)
t CSB
1.0
–
–
μs
Rising Edge of RSTB to Falling Edge of CSB (Required Setup Time)(39)
t ENBL
5.0
–
–
μs
Time)(39)
t LEAD
500
–
–
ns
SPI INTERFACE ELECTRICAL CHARACTERISTICS(36)
Maximum Operating Frequency of the Serial Peripheral Interface (SPI)(37)
Required Low-state Duration for reset RSTB
(38)
Falling Edge of CSB to Rising Edge of SCLK (Required Setup
Falling Edge of SCLK to Rising Edge of CSB (Required Setup lag Time)(39)
t LAG
60
–
–
ns
Required High-state Duration of SCLK (Required Setup Time)(39)
t WSCLKh
50
–
–
ns
Time)(39)
t WSCLKl
50
–
–
ns
–
ns
Required Low-state Duration of SCLK (Required Setup
SI to Falling Edge of SCLK (Required Setup
Time)(40)
t SI (SU)
15
–
Falling Edge of SCLK to SI (Required hold Time of the SI signal)(40)
t SI (H)
30
–
–
ns
SO Rise Time
t RSO
–
–
20
ns
t FSO
–
–
20
ns
CL = 80 pF
SO Fall Time
CL = 80 pF
SI, CSB, SCLK, Max. Rise Time allowing operation at fSPI = 8.0 MHz(40)
SI, CSB, SCLK, Max. Fall Time allowing operation at fSPI = 8.0
t RSI
–
–
11
ns
MHz(40)
t FSI
–
–
11
ns
pin(41)
Time from Rising Edge of SCLK to reach a valid level at the SO
tVALID
–
–
44
ns
Time from Falling Edge of CSB to reach low-impedance on SO (access time)(42)
t SOEN
–
–
30
ns
Time from Rising Edge of CSB to reach high-impedance on SO pin (turn off time)
t SODIS
30
ns
Notes:
36. Parameters guaranteed by design. It is recommended to tie unused SPI-pins to GND by resistors 1.0 k <R <10 k
37. For clock frequencies > 4.0 MHz, series resistors on the SPI pins should preferably be removed. Otherwise, 470 pF (VMAX. > 40 V)
ceramic speed-up capacitors in parallel with the >8.0 kΩ input resistors are required on pins SCLK, SI, SO, CS
38. RSTB low duration is defined as the minimum time required to switch off the channel when previously put ON in SPI mode (direct inputs
inactive).
39. Minimum setup time required for the device is the minimum required time that the microcontroller must wait or remain in a given state.
40. Rise and Fall time of incoming SI, CSB, and SCLK signals.
41. Time required for output data to be available for use at SO, measured with a 80 pF capacitive load.
42. Time required for output data to be terminated at SO measured without a series resistor connected CSB.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
21
ELECTRICAL CHARACTERISTICS
TIMING DIAGRAMS
TIMING DIAGRAMS
IN[0:1]
High Logic Level
Low Logic Level
Time
or
CSB
High Logic Level
Low Logic Level
Time
VHS[0:1]
RPWM range defined for 50% of VPWR
VPWR
50%VPWR
Time
VHS[0:1]
80% VPWR
20% VPWR
t DLY_XX
(t DLY(on))
SR R
t DLY_XX
(t DLY(off))
SR F
Time
Figure 4. Output Voltage Slew Rate and Delay
IOCH1
IOCH2
Load
Current
Bulb profile: CONFs = 0 (V (pin 5/6) < 0.8 V).
Static Overcurrent protection profile activated once per turn-on.
Default levels shown as solid lines
IOCM1
IOCM2
IOCL1
IOCL2
IOCL3
Time
t OCM2_L
t OCM1_L
t OCH2
t OCH1
Figure 5. Overcurrent Protection Profile for Bulb Applications
06XS4200
22
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
TIMING DIAGRAMS
IOCH1
Inductive Load profile:
CONFs = 1 (V (pin 5/6) > 2.0 V)
IOCH2
Default levels shown as solid lines
Dynamic overcurrent window, activated
when the IOCLX threshold is crossed
Load
Current
IOCL1
IOCL2
Load current
IOCL3
Time
t OCM2_M
t OCM1_M
t OCH2
t OCH1
Figure 6. Overcurrent Protection Profile for Applications with Inductive Loads (DC motors, solenoids)
RSTB
VIH
10% VDD
VIL
tWRSTB
tCSB
tENBL
CSB
90% VDD
VIH
10% VDD
VIL
tRSI
tWSCLKh
tLEAD
tLAG
VIH
90% VDD
SCLK
10% VDD
tSI(SU)
VIL
tWSCLKl
tSI(H)
SI
Don’t Care
90% VDD
10% VDD
tFSI
VIH
Must be Valid
Don’t Care
Must be Valid
tSOEN
SO
Tri-stated
Don’t Care
VIL
tSODIS
Tri-stated
VIH
VIL
Figure 7. Timing Requirements During SPI Communication
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
23
ELECTRICAL CHARACTERISTICS
TIMING DIAGRAMS
tFSI
tRSI
VOH
90% VDD
50%
SCLK
10% VDD
VOL
VOH
10% VDD
SO
VOL
tRSO
Low to High
tVALID
tFSO
SO
High To Low
VOH
90% VDD
10% VDD
VOL
Figure 8. Timing Diagram for Serial Output (SO) Data Communication
turn-on
control
(from IN_s or CSB)
See Figure 4
VHS[0:1]
turn-off
control
(from IN_s or CSB)
VPWR
50%VPWR
Time
VCSNS
t DLY_XX
(t DLY(ON))
95% of scaled
output current
VSYNC
5.0 V
0.0 V
t DLY_XX
(t DLY(OFF)
synchronous Mode
t SYNCVAL
Track & Hold Mode
Time
t CSNSVAL_xx
t SYNREAD_xx
Time
Figure 9. Synchronous & Track-and-Hold Current Sensing Modes: Associated Delay & Settling Times
06XS4200
24
Analog Integrated Circuit Device Data
Freescale Semiconductor
FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 06XS4200 is a two-channel, 24 V high-side switch
with integrated control and diagnostics designed for truck,
bus, and industrial applications. The device provides a high
number of protective functions. Both low RDS(on) channels
(< 6.0 mOhm) can independently drive various load types like
light bulbs, solenoid actuators, or DC motors. Device control
and diagnostics are configured through a 16-bit SPI port with
daisy chain capability.
Independently programmable output voltage slew rates
allow satisfying electromagnetic compatibility (EMC)
requirements.
Both channels can independently be operated in several
different switching modes: internal clock, internal PWM mode
(fully autonomous operation), external clock, and direct
control switching mode.
Current sensing with an adjustable ratio is available on
both channels, allowing both high-current (bulbs) and low-
current (LED) monitoring. By activating the Track & Hold
mode, current monitoring can be performed during the
switch-Off phase. This allows random access to the current
sense functionality. A patented offset compensation
technique further enhances current sense accuracy.
To avoid turning off during inrush current, while being able
to monitor it, the device features a dynamic overcurrent
threshold profile. For bulbs, this profile is a stair function with
stages of which the height and width are programmable
through the SPI port. DC motors can be protected from
overheating by activating a specific window-shaped
overcurrent profile that allows stall currents of limited
duration.
Whenever communication with the external microcontroller is lost, the device enters Fail-safe Operation mode,
but remains operational, controllable and protected.
PIN ASSIGNMENT AND FUNCTIONS
Functions and register bits that are implemented
independently for both channels have extension “_s”. Max.
ratings of the pins are given in Table 3.
OUTPUT CURRENT MONITORING (CSNS)
The CSNS pin allows independent current monitoring of
channel 0 or channel 1 up to the steady-state overcurrent
threshold. It can also be used to sense the device
temperature. The different functions are selected by setting
bits CSNS1_en and CSNS0_en to the appropriate value
(Table 12). When the CSNS pin is sensed during switch-off in
the (optional) track & hold mode, it outputs the scaled value
of the load current as it was just before turn-Off. When
several devices share the same pull-down resistor, the CSNS
pins of unused devices must be tri-stated. This is
accomplished by setting CSNS0_en = 0 and CSNS1_en = 0
in the GCR register. Settling time (tCSNSVAL_XX) is defined as
the time between the instant at the middle of the output
voltage’s rising edge (HS[0:1] = 50% of VPWR), and the
instant at which the voltage on the CSNS-pin has settled to
±5.0% of its final value. Anytime an overcurrent window is
active, the CSNS pin is disabled (see Overcurrent Detection
on Resistive and Inductive Loads). The current and
temperature sensing functions are unavailable in Fail-safe
mode and in Normal mode when operating without the VDD
supply voltage. In order to generate a voltage output, a pulldown resistor is required (R(CSNS) = 1.0 kOhm typ. and 470
< R(CSNS) < 10 k). When the current sense resistor
connected to the CSNS pin is disconnected, the CSNS
voltage is clamped to VCL(CSNS). The CSNS pin can source
currents up to about 5.6 mA.
CURRENT SENSE SYNCHRONIZATION (SYNC)
To synchronize current sensing with an external process,
the SYNC signal can be connected to a digital input of an
external MCU. SYNC is asserted logic low when the current
sense signal is accurate and ready to be read. The current
sense signal on the CSNS pin has the specified accuracy
tSYNREAD_XX seconds after the falling edge on the SYNC pin
(Figure 9) and remains valid until a rising edge is generated.
The rising edge that is generated by the SYNC pin at the turnOFF instant (internal or external) may also be used to
implement synchronization with the external MCU.
Parameter tSYNCVAL_XX is defined as the time between the
instant at the middle of the output-voltage rising edge
(HS[0:1] = 50% of VPWR), and the instant at which the voltage
on the SYNC-pin drops below 0.4 V (VSOL). The SYNC pins
of different devices can be connected together to save microcontroller input channels. However, in this configuration, the
CSNS function of only one device should be active at a time.
Otherwise, the MCU does not determine the origin of the
SYNC signal. The SYNC pin is open drain and requires an
external pull-up resistor to VDD.
DIRECT CONTROL INPUTS (IN0 AND IN1)
The IN[0:1] pins allow direct control of both channels. A
logic [0] level turns off the channel and a logic[1] level turns it
on (Channel Control in Normal Mode). When the device is in
Sleep mode, a transition from logic 0 to logic 1 on any of
these pins wake it up (Sleep Mode). If it is desired to
automatically turn on the channels after a transition to Failsafe mode, inputs IN[0] and IN[1] must be externally
connected to the VPWR pin by a pull-up resistor (e.g.
10 kOhm typ.). However, this prevents the device from going
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
25
FUNCTIONAL DESCRIPTION
PIN ASSIGNMENT AND FUNCTIONS
into Sleep mode. Both IN pins are internally connected to a
pull-down resistor.
CONFIGURATION INPUTS (CONF0 AND CONF1)
The CONF[0 :1] input pins allow configuring both channels
for the appropriate load type. CONF = 0 activates the bulb
overcurrent protection profile, and CONF = 1 the DC motor
profile. These inputs are connected to an internal voltage
regulator of 3.3 V by an internal pull-up current source IUP.
Therefore, CONF = 1 is the default value when these pins are
disconnected. Details on how to configure the channels are
given in the table Overcurrent Profile Selection.
FAULT STATUS (FSB)
This open-drain output is asserted low when any of the
following faults occurs (see Fault Mode): overcurrent (OC),
overtemperature (OT), Output connected to VPWR, Severe
short-circuit (SC), OpenLoad in ON state (OL_ON),
OpenLoad in OFF state (OL_OFF), External Clock-fail
(CLOCK_fail), overvoltage (OV), and undervoltage (UV).
Each fault type has its own assigned bit inside the STATR,
FAULTR_s, or DIAGR_s register. Fault type identification
and fault bit reset are accomplished by reading out these
registers. They are part of the SO register (Table 13) and are
accessed through the SPI port.
PWM CLOCK (CLOCK)
edge of CSB. The SO output driver is enabled when CSB is
logic [0]. CSB should transition from a logic [1] to a logic [0]
state only when SCLK is at logic [0] (Figure 7 and Figure 8).
CSB is internally pulled up to VDD through IUP.
SPI SERIAL CLOCK (SCLK)
The SCLK pin clocks the SPI data communication of the
device. The serial input pin (SI) transfers data to the SI shift
registers on the falling edge of the SCLK signal while data in
the SO registers are transferred to the SO pin on the rising
edge of the SCLK signal. The SCLK pin must be in the low
state when CSB makes any transition. For this reason, it is
recommended to have the SCLK pin in the logic [0] state
when the device is not accessed (CSB is at logic [1]). When
CSB is set to logic [1], signals at the SCLK and SI pins are
ignored and the SO output is tri-stated (high-impedance).
The SCLK pin is connected to an internal pull-down current
source IDWN.
SERIAL INPUT (SI)
Serial input (SI) data bits are shifted in at this pin. SI data
is read on the falling edge of SCLK. 16-bit data packages are
required on the SI pin (see Figure 7), starting with bit D15
(MSB) and ending with D0 (LSB). All the internal device
registers are addressed and controlled by a 4-bit address
(D9-D12) described in Table 11. Register addresses and
function attribution are described in Table 12. The SI pin is
internally connected to a pull-down current source, IDWN.
This pin is the input for an external clock signal that
controls the internal PWM module.The clock signal is
monitored by the device. The PWM module controls ON-time
and turn-ON delay of the selected channels. The CLOCK pin
should not be confused with the SCLK pin, which is the clock
pin of the SPI interface. CLOCK has an internal pull-down
current source (IDWN) to GND.
This pin supplies the SPI circuit (3.3 V or 5.0 V). When
lost, all circuitry becomes supplied by a VPWR derived
voltage, except the SPI’s SO shift-register that can no longer
be read.
RESET (RSTB)
GROUND (GND)
All SPI register contents are reset when RSTB = 0. When
RSTB = 0, the device returns to Sleep mode tIN sec. after the
last falling edge of the last active IN[0:1] signal. As long as the
Reset input (RSTB pin) is at logic 0 and both direct input
states are low, the device remains in Sleep mode (Channel
configuration through the SPI). A 0-to-1 transition on RSTB
wakes up the device and starts a watchdog timer to check the
continuous presence of the SPI signals. To do this, the device
monitors the contents of the first bit (WDIN bit) of all SPI
words following that transition (regardless the register it is
contained in). When this contents is not alternated within a
duration tWDTO, SPI communication is considered lost, and
Fail-safe mode is entered (Entering Fail-safe Mode). RSTB is
internally pulled-down to GND by resistor RDWN.
This is the GND pin common for both the SPI and the other
circuitry.
CHIP SELECT (CSB)
Data communication over the SPI port is enabled when the
CSB pin is in the logic [0] state. Data from the Input Shift
registers are locked in the addressed SI registers on the
rising edge of CSB. The device transfers the contents of one
of the 8 internal registers to the SO register on the falling
SUPPLY OF THE DIGITAL CIRCUITRY (VDD)
POSITIVE SUPPLY PIN (VPWR)
This pin is the positive supply and the common input pin of
both switches. A 100 nF ceramic capacitor must be
connected between VPWR and GND, close to the device. In
addition, it is recommended to put a ceramic capacitor of at
least 1.0 µF in parallel with this 100 nF capacitor.
SERIAL OUTPUT (SO)
The SO pin is a tri-stateable output pin that conveys data
from one of the 13 internal SO registers or from the previous
SI register to the outside world. The SO pin remains in a highimpedance state (tri-state) until the CSB pin becomes
logic [0]. It then transfers the SPI data (device state,
configuration, fault information). The SO pin changes state at
the rising edge of the SCLK signal. For daisy-chaining, it can
be read out on the falling edge of SCLK. VDD must be present
06XS4200
26
Analog Integrated Circuit Device Data
Freescale Semiconductor
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
before the SO registers can be read. The SO register
assignment is described in Table 13.
- 20%) is recommended between these pins and GND for
optimal EMC performances.
POWER SWITCH OUTPUT PINS (HS0 AND HS1)
FAIL-SAFE OUTPUT (FSOB)
HS0 and HS1 are the output pins of the power switches, to
be connected to the loads. A ceramic capacitor (< = 22 nF (+/
This pin (active low) is used to indicate loss of SPI
communication or loss of SPI supply voltage, VDD. This opendrain output requires an external pull-up resistor to VPWR.
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
POWER SUPPLY
internal regulator
MCU
INTERFACE
MCU INTERFACE and
OUTPUT CONTROL
SELFPROTECTED
High-side
SWITCHES
HS0-HS1
SPI INTERFACE
PARALLEL CONTROL
INPUTS
PWM CONTROLLER
POWER SUPPLY
The device operates with supply voltages from 6.0 to 58 V
(VPWR), but is full spec. compliant between 8.0 and 36 V. The
VPWR pin supplies power to the internal regulator, analog,
and logic circuit blocks. The VDD pin (5.0 V typ.) supplies the
output register of the Serial Peripheral Interface (SPI).
Consequently, the SPI registers cannot be read without
presence of VDD. The employed IC architecture guarantees
a low quiescent current in Sleep mode.
SWITCH OUTPUT PINS HS0 & HS1
HS0 and HS1 are the output pins of the power switches.
Both channels are protected against various kinds of shortcircuits and have active clamp circuitry that may be activated
when switching off inductive loads. Many protective and
diagnostic functions are available. For large inductive loads,
it is recommended to use a freewheeling diode. The device
can be configured to control the output switches in parallel,
which guarantees good switching synchronization.
COMMUNICATION INTERFACE AND DEVICE
CONTROL
In Normal mode the output channels can either be
controlled by the direct inputs or by the internal PWM module,
which is configured by the SPI register settings. For
bidirectional SPI communication, VDD has to be in the
authorized range. Failure diagnostics and configuration are
also performed through the SPI port. The reported failure
types are: OpenLoad, short-circuit to battery, severe shortcircuit to ground, overcurrent, overtemperature, clock-fail,
undervoltage, and overvoltage. The SPI port can be supplied
either by a 5.0 V or by a 3.3 V voltage supply. For direct input
control, VDD is not required.
A Pulse Width Modulation (PWM) circuit allows driving
loads at frequencies up to 1.0 kHz from an external or an
internal clock. SPI communication is required to set these
options.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
27
FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
The device possesses two high-side switches (channels)
each of which can be controlled independently. The device
has four fundamental operating modes: Sleep, Normal, Failsafe, and Fault mode, as shown in Table 6.
Each channel can be controlled in three different ways in
Normal mode: by a signal on the Direct Input pin, by an
internal clock signal (autonomous operation) or by an
external clock signal. For bidirectional SPI communication, a
second supply voltage is required (VDD = 5.0 V or 3.3 V).
When only the direct inputs IN[x] are used, VDD isn’t required.
DEVICE START-UP SEQUENCE
To put the device in a known configuration and guarantee
predictable behavior, the device must undergo a wake-up
sequence. However, it should not be woken up earlier than
the moment at which VPWR has exceeded its undervoltage
threshold, VPWR(UV), and VDD has exceeded its supply
failure threshold, VDD(FAIL). In applications using the SPI
port, the device is typically put in wake mode by setting RSTB
= 1. Wake-up of applications with direct input control can be
achieved by having signals IN_ON[0] = 1 or IN_ON[1 ] = 1
(see Figure 10). After wake-up, all SPI register contents are
reset (as defined in Table 12 and Table 13) and Normal
mode is entered. All the device functions are available 50 µs
later (typically).
If the start-up sequence is not performed at device startup, its configuration may be undetermined and correct
operation is not guaranteed. In situations where the above
described start-up sequence can not be performed, it is
recommended to generate a wake-up event after the moment
VPWR has reached the undervoltage threshold.
CHANNEL CONFIGURATION THROUGH THE SPI
Setting the Channel Configuration
The channel configuration is determined by the contents of
the pulse-width (PWMR_s), the configuration (CONFR_s)
and the overcurrent (OCR_s) registers. They allow setting,
among others, the following parameters: duty-cycle, delay,
Slew Rate, PWM enable (PWM_en), clock selection
(CLOCK_sel), prescaler (PR), and direct_input disable
(DIR_dis). Extension “_s” means that these registers exist for
each of both channels. Function assignment is described in
detail in the section SI Register Addressing.
Reading Back the Channel’s Status and Settings
The channel’s global switching and operating states (On/
Off, normal/fault) are all contained in the SO-STATR register
(see Table 13). The precise fault type can be found by
reading out the FAULTR_s and STATR registers. The current
channel settings (channel configuration) can be known by
reading the PWMR, CONF, OCR, RETRYR, GCR, and DIAG
registers (see section Serial Output Register Assignment and
further).
NORMAL MODE
Normal mode (bit NM = 1) can be entered in two ways:
either by driving the device through the direct inputs (IN[x]) or
by establishing SPI communication (requires RSTB = high).
Bidirectional SPI communication additionally requires the
presence of VDD. To maintain the device in Normal mode,
communication must take place regularly (see Entering and
Maintaining Normal Mode). The device is in Normal mode
(NM) when:
• VPWR (and VDD) are within the normal range and
• wake-up = 1, and
• fail-safe = 0, and
• fault = 0.
Channel Control in Normal Mode
In direct input mode, the channel’s switching state (On/Off)
is controlled by the logic state of the direct input signal with
the default values (00) of turn-on delay and slew rate,
specified in Table 5.
In internal clock mode, the switching state is controlled by
an internal clock signal (Internal Clock & Internal PWM
(Clock_int_s bit = 1)). Frequency, slew rate, duty-cycle, and
turn-on delay are programmable independently for both
channels.
In external clock mode, the frequency of the external clock
controls the output's PWM frequency, but slew rate, duty
cycle, and turn-on delay are still programmable.
Factors Determining the Channel’s Switching State
The switching state of a channel is defined by the
instantaneous value of the output voltage. It is defined as
“On” when the output voltage V(HS[x]) > VPWR /2 and “Off”
when V(HS[x]) < VPWR /2. The channel’s switching state
should not be confused with the device’s internal channel
control state hson[x] (= High-side On). Signal hson[x] defines
the targeted switching state of the channel (On/Off). It is
either controlled by the value of the direct input signal or by
that of the internal/external clock signals combined with the
SPI register settings. The value of hson[x] is given by the
following boolean expression:
hson[x] = [(IN[x] and DIR_dis[x]) or (On bit [x] and
Duty_cycle[x] and PWM_en[x] = 1) or (On bit [x] and
PWM_en[x] = 0)].
In this expression Duty_cycle[x] represents the value of
the duty cycle, set by bits D7…D0 of the PWMR register
(Table 7). The channel’s actual switching state may differ
from the control signal’s state in the following cases:
• short circuits to GND, before automatic turn-Off (t < tFAULT)
06XS4200
28
Analog Integrated Circuit Device Data
Freescale Semiconductor
FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
• short circuits to VPWR when the channel is set to Off
• VPWR < 13 V when OpenLoad-in-Off-state detection is
selected and the load is actually lost
• during the turn-on transition as long as V(HS[x])< Vpwr/2
• during the turn-off transition as long as V(HS[x]) > Vpwr/2
Entering and Maintaining Normal Mode
A 0-to-1 transition on RSTB, (when both VPWR and VDD
are present) or on any of both direct inputs IN[x] (when only
supplied by VPWR) puts the device in Normal mode. If
desired, the device can be operated in Normal mode without
VDD, but this requires that at least one of both direct inputs be
regularly turned on (Operation and Operating Modes). To
maintain the device in Normal mode (NM), communication
must take place on a regular basis.
For SPI communication, the state of the WDIN bit must be
alternated at least every 310 ms (typ.) (tWDTO), unless the
WD_disable bit is set to 1.
For direct input control, the timing requirements are shown
in Figure 10. A signal called IN_ON[x] is not directly
accessible to the user but is used by the internal logic circuitry
to determine the device state. When no activity is detected on
a direct input pin (IN[x]) for a time longer than tIN = 250 ms
(typ.), timeout is detected and IN_ON[x] goes low. When this
occurs on both channels, Sleep mode is entered (Sleep
Mode), provided reset = RSTB = 0
It enters Fail-safe mode in case of a timeout on SPI
communication or when VDD is lost after having been initially
present (if this function was previously enabled by setting:
VDD_FAIL_EN bit = [1]). Setting watchdog disabled
(WD_dis = 1, D4 of the GCR register) avoids entering Fail-
safe mode after watchdog timeout. Device behavior upon
fault occurrence is explained in the paragraph on Faults
(Fault Mode).
.
IN[x]
tIN
IN_ON[x]
Figure 10. Relation Between Signals IN(x) and IN_ON[x]
Direct Control Mode
When RSTB = 0 (and also in Fail-safe mode), the
channels are merely controlled by the direct input pins IN[x].
All protective functions (OC, OT, SC, OV, UV) are operational
including auto-retry. To avoid entering Sleep mode at
frequencies < 4.0 Hz, reset should be set to RSTB = 1.
Going from Normal to Fail-safe, Fault or Sleep Mode
The device changes from Normal to Fail-safe (Fail-safe
Mode), Sleep mode (Sleep Mode), or Fault mode (Fault
Mode), according to the value of the following signals (see
Table 6).
• wake-up = RSTB or IN_ON[0] or IN_ON[1]
• fail-safe = (VDD Failure and VDD_FAIL_en) or (SPI
watchdog timeout (tWDTO) and WD_dis = 0)
• fault = OC[0:1] or OT[0:1] or SC[0:1] or UV or (OV and
OV_dis)
Table 6. Device Operating Modes
Mode
Wake-up
Failsafe
Fault
Comments
Sleep
0
x
x
All channels are OFF.
Normal
1
0
0
The SPI Watchdog is active when: VDD = 5.0 V, WD_dis = 0, RST = 1
Fail-safe
1
1
0
The channels are controlled by the IN inputs. (see page 30)
Fault
1
X
1
The channels are OFF, see page 31.
x = Don’t care.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
29
FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
Sleep
(wake-up = 0)
(wake-up = 1) and
(fail-safe = 1)
and (fault = 0)
(wake-up = 1)
and (fault = 1)
(wake-up = 0)
(fail-safe = 1) and
(wake-up = 1)
and (fault = 1)
Fail-safe
(fail-safe = 0) and (wake-up = 1) and (fault = 0)
Fault
(fail safe = 1) and
(wake-up = 1) and
(fault = 0)
(wake-up = 0)
(fail-safe = 0) and
(wake-up = 1) and
(fault = 1)
Normal
(fail-safe = 0) and (wakeup = 1) and (fault = 0)
(fail-safe = 0) and (wake-up = 1) and (fault = 0)
(fail-safe = 1) and (wake-up = 1) and (fault = 0)
Figure 11. Device Operating Modes
SLEEP MODE
In Sleep mode, the channels and the SPI interface are
turned off to minimize current consumption.
The device enters Sleep mode (wake-up = 0) when both
Direct Input pins IN(x) remain Off longer than tIN sec. (when
reset is active; RSTB = 0). This is expressed as follows:
• VPWR (and VDD) are within the normal range, and
• wake-up = 0 (wake-up = RSTB or IN_ON[0] or
IN_ON[1])
• and
• fail-safe = X and
• fault = X
When employed, VDD must be kept in the normal range.
Sleep mode is the default mode after the first application of
the supply voltage (VPWR), prior to any I/O communication
(RSTB and the internal states IN_ON[0:1] are still at logic [0]).
All SPI register contents remain in their default state during
sleep mode.
FAIL-SAFE MODE
Entering Fail-safe Mode
Fail-safe mode is entered either upon loss of SPI
communication or after loss of optional SPI supply voltage
VDD (VDD Out of Range). The FSOB pin goes low and the
channels are only controlled by the direct inputs (IN[0:1]). All
protective functions remain fully operational. Previously
latched faults are delatched and SPI register contents is reset
(except bits POR & PARALLEL). The SPI registers can not
be accessed. These conditions are also described by the
following expressions:
• VPWR is within the normal voltage range, and
• wake-up = 1, fault = 0, and
• fail-safe = 1 ((VDD Failure and VDD_FAIL_en = 1
before) or (t(SPI)> tWDTO and WD_dis = 0).
The last condition describes the loss of SPI
communication which is detailed in the next section.
Watchdog on SPI Communication and Fail-safe Mode
When VDD is present, the SPI watchdog timer is started
upon a rising edge on the RSTB pin. Thereafter the device
monitors the state of the first bit (WDIN) of all received SPI
words. When the state of this bit is not alternated at least
once within a data stream of duration tWDTO = 310 ms typ.,
the device considers that SPI communication has been lost
and enters Fail-safe mode. This behavior can be disabled by
setting the bit WD_DIS = 1. The value of watchdog timeout is
derived from an internal oscillator.
Returning from Fail-safe to Normal mode
To exit Fail-safe mode and return to normal mode again,
first a SPI data word with its WDIN bit = 1 (D15) must be
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FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
received by the device (regardless the register it is contained
in and regardless the values of the other bits in this register).
Next, a second data word must be received within the timeout
period (tWDTO = 310 ms typ.) to be able to change any SPI
register contents. Upon entering Normal mode, the FSOB pin
returns to logic high and previously set faults and SPI
registers are reset, except bits POR, PARALLEL and fault
bits of latchable faults that had actually been latched.
Returning from Fault Mode to Fail-safe Mode
FAULT MODE
An auto-retry function (see Auto-retry) controls how the
device responds to the so-called latchable faults. Latchable
faults are: overcurrent (OC), severe short-circuit (SC),
overtemperature (OT), and undervoltage (UV). If a latchable
fault occurs, the channel is turned off, the FSB terminal goes
low, and the assigned fault bit is set. These bits can not be
reset before the next turn-on event is generated by auto-retry.
Next, the channel automatically turns on at a programmable
interval (provided auto-retry was enabled and the channel
wasn’t latched).
If the failure disappears prior to the expiration of the
available amount of auto-retries, the FSB pin automatically
returns to logic [1], but the fault bit remains set. It can then still
be reset by reading the SPI register it is contained in.
However, the fault actually gets latched if the failure cause
hasn’t disappeared at the first turn-on event following
expiration of the available amount of auto-retries (see Autoretry). In that case, the channel gets latched and the FSB
terminal remains low. The fault bit can not be reset by reading
out the associated SPI register prior to performing a delatch
sequence (Fault Delatching).
The device enters Fault mode when any of the following
faults occurs in Normal or Fail-safe mode:
• Overtemperature fault, (latchable fault)
• Overcurrent fault, (latchable fault)
• Severe short-circuit fault, (latchable fault)
• Output shorted to VPWR in OFF state (default: disabled)
• OpenLoad fault in OFF state (default: disabled)
• OpenLoad fault in ON state (default: disabled)
• External Clock Failure (default: enabled)
• Overvoltage fault (enabled by default)
• Undervoltage fault, (latchable fault)
The Fault Status pin (FSB) asserts a fault occurrence on
any channel in real time (active low). Additionally, the
assigned fault bit in the STATR_s or FAULTR_s register is
set to one. Conversely to the FSB pin, a fault bit remains set
until the corresponding register is read, even if the fault has
disappeared. These bits can be read via the SO pin. Fault
occurrence also results in a turn-off of the incurred channel,
except for the following faults: OpenLoad (On and Off state),
External Clock Failure and Output(s) shorted to VPWR. Under
and Overvoltage occurrence causes simultaneous turn-off of
both channels. Details on the device’s behavior after the
occurrence of one of the above faults can be found in
Protection and Diagnostic Features.
Fault mode (Operation and Operating Modes) is entered
when:
• VPWR (+VDD) were within the normal voltage range, and
• wake-up = 1, and
• fail-safe = X, and
• fault = 1 (see Going from Normal to Fail-safe, Fault or
Sleep Mode)
Resetting FAULT bits
Registers STATR_s and FAULTR_s contain global and
channel-specific fault information. Reading the register
where the fault bit is contained clears it, provided failure
cause disappearance was detected and the fault wasn’t
latched.
Entering Fault Mode from Fail-safe Mode
When a Fault occurs in Fail-safe mode, the device is in
Fault/Fail-safe mode and behaves according to the
description of fault mode. However, SPI registers remain
reset and can not be accessed. Only the Direct Inputs control
the channels.
When disappearance of the fault previously produced in
Fail-safe mode has been detected, the device returns to Failsafe mode and behaves accordingly. FSB goes high, but the
auto-retry counter is not reset. Latched faults are not
delatched. SPI registers remain reset.
LATCHABLE FAULTS
Fault Delatching
To delatch a latched channel and be able to turn it on
again, a delatch sequence must be executed after
disappearance of the failure cause. Delatching also resets
the fault bit of latched faults (see Resetting FAULT bits). To
reset the FSB pin, both channels must be delatched.
Delatching is achieved either by alternating the state of the
channels’ fault control signal fc[x] (generating a 1_0_1
sequence), or by resetting the auto-retry counter (provided
retry is enabled). See Reset of the Auto-retry Counter.
Delatching then actually occurs at the rising edge of the turnon event.
Signal fc[x] is an internal signal used by the device’s
internal logic circuitry to control the diagnostic functions. The
value of fc[x] depends on the state of the variables IN_ON[x],
DIR_dis[x] and ON[x] and is expressed as follows:
fc[x] = ((IN_ON[x] and DIR_dis[x] = 0) or ON[x] = 1)
Alternating the fc[x] signal is achieved differently according
to the way the user controls the device.
• In direct-input controlled mode (DIR_dis_s = 0), the IN[x]
pin must be set low, remain low for at least tIN seconds,
and set high again (be switched On). This might happen
automatically when operating at frequencies f<4.0 Hz.
• In SPI-controlled mode, the ON_bit state (D8 of the
PWMR_s reg.) must be alternated (‘toggled’). No minimum
OFF state duration is required in this case.
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Performing a delatch sequence anytime during an ongoing
auto-retry sequence (before latching) allows turning the
channel on unconditionally.
When a Power-ON event occurs (see Loss of VPWR, Loss
of VDD and Power-on-Reset (POR)), latched channels are
also delatched and faults are reset.
When Fail-safe mode is entered (fault = 1, fail-safe
becomes 1) during operating in Fault mode (fault = 1, failsafe
= 0), previously latched faults are delatched and SPI register
content is reset (except bits POR & PARALLEL). The device
is then in a combined Fail-safe/Fault mode.
When the device was already in Fail-safe mode (fault = 1,
failsafe = 1) and (new) faults occurs, the internal auto-retry
counter does not reset and latched channels do not delatch
until a delatching sequence is performed (see Protection and
Diagnostic Features).
D2…D0 of the CONFR_s register (expressed as a number of
ext./int. PWM clock periods). To start the PWM function at a
known point in time, the PWM_en_s bit (D8 /D7 of the GCR
reg.) must be set to 1 after having set the PWMR_s (duty
cycle) and CONFR_s (delay) registers. The best way to
improve EMC is to use an external clock with a staggered
switch on delay.
Table 8. Switch-on Delay in PWM Mode
Delay Bits
Switch-On Delay
000
no delay
001
32 PWM clock periods
010
64 PWM clock periods
011
96 PWM clock periods
PROGRAMMABLE PWM MODULE
100
128 PWM clock periods
Each channel has a fully independent PWM module
activated by setting PWM_en_s. It modulates an internal or
external clock signal. Setting Clock_int_s = 1 (bit D6 of the
OCR_s register) activates the internal clock, and setting
Clock_int_s = 0 activates the external clock. The duty cycle
can be set in a range from 0% to 100% with 8 bit-resolution
(Table 7) by setting bits D8…D0 of the PWMR_s register
(Table 12). The channel’s switching frequency equals the
clock frequency divided by 256 in internal clock mode, and by
256 or 512 in external clock mode.
101
160 PWM clock periods
110
192 PWM clock periods
111
224 PWM clock periods
PR_x
CLOCK
CLOCK_fail
PWMR_s register
CLOCK_sel_x
PWM_en_x
ℜ÷ (1 + PR_x
Internal
Oscillator
CS
MUX
External Clock
Frequency Monitoring
ℜ÷ 25
VPWR
PWM
Mode
HS_x
Driver
Block
Internal Clock
Calibration
HSx
IN_x
Figure 12. Internal and External Clock Operation
Table 7. PWM Duty Cycle Value Assignment
ON-bit
Duty Cycle
Channel Configuration
0
X
OFF
1
00000000
PWM (duty cycle = 1/256)
1
00000001
PWM (duty cycle = 2/256)
1
00000010
PWM (duty cycle = 3/256)
1
n
PWM(duty cycle = (n+1)/256)
1
11111111
fully ON
By delaying the activation of one channel relative to the
other (Table 8), switch-on surges can be delayed, which may
improve EMC performance. Switch-On delay can be selected
among seven different values (default = 0) by setting bits
External Clock & Internal PWM (CLOCK_int_s = 0)
The channels can be controlled by an external clock signal
by setting bit D6 = 0 of the OCR_s register (Clock_int_s).
Duty cycle values specified in Table 7 apply. When an
external clock is used, the value of frequency division (256
when PR[x] = 0) may be doubled by setting the prescaler bit
PR[x]) = 1(bit D7 of the OCR_s reg.). This allows driving the
channels at different switching frequencies from a single
clock signal. Simultaneously setting PWM_en_1 = 1 and
PWM_en_0 = 1 synchronizes the channels.
The clock frequency on the CLOCK pin is monitored when
external clock (CLOCK_int_s = 0) and pulse width
modulation (PWM_en_s = 1) are both selected. If a clock
failure occurs under these conditions (f< fCLOCK(LOW) or f>
fCLOCK(HIGH)), the external clock signal is ignored and a fault
is detected (FSB = 0), the CLOCK_fail bit is set (OD2 in the
DIAGR register). The state of the ON_s bit in the SPI register
then determines the channel’s switching state. To return to
external clock mode (and reset FSB), the clock-fail bit must
be read and the external clock has to be within the authorized
range again.
Internal Clock & Internal PWM (Clock_int_s bit = 1)
By using a reference time slot (usually available from an
external microcontroller), the period of each of the internal
PWM clocks can be changed or calibrated (see
Programmable PWM module). Calibration of the default
period = 1/fPWM(0) reduces its maximum variation from about
+/-30% to +/- 10%. The programming procedure is initialized
by sending a dedicated word to the SI-CALR register (see
Table 12). Next, the device sets the new value of the
switching period in 2 steps. First it measures the time elapsed
between the first falling edge on the CSB pin and the next
rising edge on the CSB pin (tCSB). Then it changes the value
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OPERATION AND OPERATING MODES
of the internal clock period accordingly. The actual value of
the channel’s switching period is obtained by multiplying the
internal clock period by 256.
tCSB
CSB
load/Output short-circuited diagnostics). After setting
PARALLEL = 1, contents of SO registers in bank 0 are copied
to registers of bank 1 only when new information is written in
them. Bits OD3, OD4, and OD5 of both FAULTR_s registers
(OLON, OLOFF, OS) are always reported independently.
• Direct Input controlled Parallel mode:
The IN0 and IN1 pins must be connected externally.
2- Diagnostics in Parallel Mode:
SI
SI command
ignored
tCSB
CALR_s
Internal clock
period of channel s
When the duration of the negative CSB pulse is outside a
predefined time slot (from t CSB(MIN) to t CSB(MAX)), the
calibration event is ignored and the internal clock frequency
remains unchanged. If the value (fPWM(0)) has not been
previously calibrated, it remains at its default level.
Synchronization of both Channels
When internal clock signals are used to drive the PWM
modules, perfect synchronization over a long time can not be
achieved since both clock signals are independent. However,
when the channels are driven by an external clock, perfect
synchronization can be achieved by simultaneously setting
PWM_en_1 = 1 and PWM_en_0 = 1. The best way to
optimize EMC is to use an external clock with a staggered
switch on delay (see Table 8).
PARALLEL OPERATION
The channels can be paralleled to drive higher currents.
Setting the PARALLEL bit in the GCR register to logic [1] is
mandatory in this case. The improved synchronization of
both transistors allows an equal current distribution between
both channels. In parallel mode, both output pins (HS[x])
must be connected (as well as both IN[x] pins in case of
external control). CONF0 and CONF1 must be set to equal
values.
1- Device Configuration in Parallel mode:
There are two ways to configure the On/Off control: SPIconfigured PWM control and Direct Input Control.
• SPI configured Parallel mode:
The switching configuration is solely defined by the (SI)
PWMR_0, CONFR_0, OCR_0, and RETRY_0 registers. As
soon as PARALLEL = 1, the contents of the corresponding
registers in bank 1 are replaced by that of bank 0, except bits
D6-D8 of the CONFR_1 register (configuration of the Open
The Diagnostics in Parallel mode operate as follows:
• OpenLoad in OFF state and - OpenLoad in ON state:
The OL_ON and OL_OFF bits of both FAULTR registers
independently reports failures of the channels according to
the settings of bits D7 and D6 of the CONFR_s register.
• Current sensing:
Refer to the Table 23 for a description of the various
current sensing modes.
Only the Current sense ratio of bank 0 (D5 of the OCR_0
register) is considered. The corresponding bit in the OCR_1
register is copied from that of the OCR_0 register.
• output shorted to battery:
The OS-bit (OD3) of each of both FAULT registers
independently report this fault, according to the settings of bit
D8 of the CONFR_s reg.
3- Protections in Parallel Mode:
• Overcurrent:
-Only the Configuration of overcurrent thresholds &
blanking windows of channel 0 are considered.
-In case overcurrent (OC) occurs on any channel, both
channels are turned-off. Regardless the order of occurrence
of overcurrent (OC), both OC-bits (OD0) in the FAULT
registers are simultaneously set to logic 1.
• severe short-circuit:
In case of SC detection on any channel, both channels are
turned-off and the SC bits (OD1) in both FAULT registers are
simultaneously set to logic 1.
• overtemperature:
In case of OT detection on any channel, both channels are
turned-off and both OT bits in the FAULT registers (OD2) are
simultaneously set to logic 1.
• auto-retry:
Only one 4-bit auto-retry counter specifies the number of
successive turn-on events on paralleled channels
(RETRYR_0). The counter value in register RETRYR_1
(OD4…OD7) is copied from that in RETRYR_0.
To delatch the channels, only channel 0 needs to be
delatched.
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FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
PROTECTION AND DIAGNOSTIC FEATURES
PROTECTIVE FUNCTIONS
Table 9. Overcurrent Profile Selection
Overtemperature Fault (latchable fault)
The channels have individual overtemperature detection.
As soon as a channel’s junction temperature rises above TSD
(175 °C typ.), it is turned OFF, the overtemperature bit
(OT = OD2) is set, and FSB = 0. FSB can only be reset by
turning ON the channel when the junction temperature of
both channels has dropped below the threshold: TJ < TSD.
Overtemperature is detected in ON and in OFF state:
• If the channel is ON, the associated output is switched
OFF, the OT bit is set, and FSB = 0.
• If the channel is OFF: FSB goes to logic [0] and remain low
until the temperature of both channels is below TSD and
any of the channels is turned on again.
The auto-retry function (if activated) automatically turns on
the channel when the junction temperature has dropped
below TSD. The OT fault bit can only be reset by reading out
the FAULTR register, provided that TJ < TSD and FSB = 1
again.
CONF[0:1] Resistor/Voltage
Type of Load
1.0 kOhm < R(CONF[x]) <
10 kOhm
resistive: CONF = 0,
Lighting-Mode
or 0 < V(CONF[X) < VIL (0.8 V)
R(CONF[x]) > 50 kOhms
inductive: CONF = 1,
or VIH (2.0 V)< V(CONF) < 5.0 V
DC motor mode
When overcurrent windows are active, current sensing is
disabled and the SYNCB pin remains high. This is illustrated
by Figure 13. After turn on, the output voltage (second
waveform (20 V/div.) and the output current (first waveform,
12 A/div.) rise immediately, but the current sense voltage
(third waveform, 2.0 V/div, 1.0 V = 3.0 A) and its
synchronization signal SYNC (fourth waveform, 5.0 V/div.)
only become active at the end of the selected overcurrent
window (duration tOCM2_L).
Overcurrent Fault (latchable fault)
When an overcurrent (OC) is detected, the channel is
immediately turned Off (after t FAULT seconds). The OC-bit is
set to 1 and FSB becomes low [0]. Overcurrent is detected
anytime the load current crosses an overcurrent threshold or
exceeds the window width of the selected overcurrent
protection profile. This profile is a stair function with windows
the height and width of which are preselected through the SPI
port. The maximum allowable value of the load current at a
particular moment in time is defined by levels I_OCH and
I_OCM and windows tOCM_x and tOCH (programmable by SPI
bits). The steady-state overcurrent protection level I_OCL is
defined by the settings of the OCL and HOCR bits. Anytime
an overcurrent window is active, current sensing is blanked
and SYNC becomes 1.
Overcurrent Duration Counter
The load current can spend only a defined amount of time
in a particular window of the overcurrent profile. If the time in
the window exceeds the selected window width (tOCX) or the
overcurrent threshold is crossed, the channel is turned off
(OC fault), followed by auto-retry (if enabled). An internal
overcurrent duration counter is employed for this function.
Overcurrent Detection on Resistive and Inductive Loads
According to the load type (resistive or inductive), one of
two different overcurrent profiles should be selected. This is
done by connecting a resistor with the appropriate value
between the CONF[0:1] pins and GND (Table 9).
Figure 13. Current Sense Blanking during Overcurrent
Window Activity
Activation of the lighting profile is time driven and
activation of the DC motor profile is event driven, as
explained below.
In lighting mode, the height of the overcurrent profile is
defined by three different thresholds (I_OCH, I_OCM and I_OCL,
which stand for the higher, the middle, and the lower
overcurrent threshold), as illustrated by Figure 5. This profile
has two adjacent windows the width of which is compatible
with typical bulb inrush current profiles. The width of the first
of these windows is either tOCH1 or tOCH2. The width of the
second window is either tOCM1_L or tOCM2_L (see Table 18).
The lighting profile is activated at each turn-on event,
including auto-retry, except in switch mode. In switch mode,
the profile is activated only at the first turn-on event, but is not
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OPERATION AND OPERATING MODES
renewed. During the on-period, the load current is
continuously compared to the programmed overcurrent
profile. The channel is switched Off when a threshold is
crossed or a window width is exceeded.
In DC motor mode, only one overcurrent window exists,
defined by only two different thresholds (I_OCH and I_OCL) as
illustrated by Figure 6. This window is opened anytime the
output current exceeds the selected lower overcurrent
threshold (IOCLx). In this case, the allowed overcurrent
duration is defined by parameters tOCM1_M, tOCM2_M, tOCH1,
and tOCH2.
The selection of the different profiles and values is
explained in the section Address A0100 — Overcurrent
protection configuration Register (OCR_s).
Reset of the Duration Counter
Auto-retry after Overcurrent Shut Off
When a severe short-circuit (SC) is detected at turn-ON
(wiring length LLOAD< LSHORT, see Table 4), the channel is
shut Off immediately. For wiring lengths above LSHORT, the
device is protected from short-circuits by the normal
overcurrent protection functions (Overcurrent Fault (latchable
fault)). When an SC occurs, FSB goes low (logic [0]), and the
SC bit is set, eventually followed by an auto-retry. SC is of the
latchable fault type (see Protection and Diagnostic Features
and Fault Delatching).
When auto-retry is activated, OC-latching (Overcurrent
Fault (latchable fault)) only occurs after expiration of the
available amount of auto-retries (described in section Autoretry).
Switch Mode Operation and Overcurrent Duration
Switch mode is defined as any device operation with a
duty cycle lower than 100% at a frequency above fPWM_EXT
(min.) or fPWM_INT (min.). The device may operate in Switch
mode in internal/external PWM or in direct input mode. In
switch mode, the accumulated time spent by the load current
in a particular window segment during On-times of
successive switching periods is identified by the
aforementioned duration counter, and compared to the active
segment width. The associated off-times are excluded by the
duration counter. The channel is turned-off when the value of
the counter exceeds the window width. In Figure 14,
overcurrent detection shutdown is shown in case of switch
mode operation with a duty cycle of 50% (solid line) and
100% (fully-on, dashed line). The device is turned off much
later in switch mode than in fully-on mode, since the duration
counter only counts overcurrent during on-times.
Reset of the duration counter is achieved by performing a
delatch sequence (Fault Delatching). In lighting mode
(CONFs = 0), this counter is also reset automatically at each
auto-retry (but not in DC motor mode).
In DC motor mode, the duration counter is reset either by
performing a delatch sequence or (automatically) after
occurrence of a new on-period without any overcurrent
([hson[x] = 1). Reset then actually occurs at the first turn-off
instant following that on-period.
In switch mode, the duration counter is not reset by normal
PWM activity unless delatching is performed.
Severe Short-circuit Fault (latchable fault)
Overvoltage Detection (enabled by default)
By default, the supply overvoltage protection (VPWR) is
enabled when overvoltage occurs (VPWR > VPWR(OV)), the
device turns OFF both channels simultaneously, the FSB pin
is asserted low, and the OV fault bit is set to logic [1]. The
channels remain OFF until the supply voltage drops below a
threshold voltage VPWR < VPWR(OV) - VPWR(OVHYS). The OV
bit can then be reset by reading out the STATR register.
The overvoltage protection can be disabled by setting the
OV_dis = 1 in the General Configuration (GCR) register. In
this case, the FSB pin neither asserts a fault occurrence, nor
turn the channels off. However, the fault register (OV bit) still
reports an overvoltage occurrence (when VPWR > VPWR(OV))
as a warning. When VPWR > VPWR(OV), the value of the onresistance on both channels (RDS(on)) still lays within the
ranges specified in Table 4.
Undervoltage Fault (Latchable Fault)
Figure 14. Overcurrent shutdown in PWM mode (solid
line) and fully-on mode (dashed line)
The channels are always turned off when the supply
voltage (VPWR) drops below VPWR(UV). FSB drops to logic [0],
and the fault register’s (common) UV bit is set to [1].
When the undervoltage condition then disappears, two
different cases exist:
• If the channel’s internal control signal hson[x] is off, FSB
returns to logic [1], but the UV bit remains set until at least
one output is turned on (warning).
• If the channel’s control signal is on, the channel only turns
on if a delatch or POR sequence is performed prior to the
turn on request. The UV bit can then only be reset by
reading out the STATR register.
Auto-retry (if enabled) starts as soon as the UV condition
disappears.
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FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
Extended Mode Protection
In extended mode (6.0 V < VPWR < 8.0 V or 36 V < VPWR
< 58 V), the channels are still fault protected, but compliance
with the specified protection levels is not guaranteed. The
register settings however (including previously detected
faults) remain unaltered, provided VDD is within the
authorized range. Below 6.0 V, the channels are only
protected from overtemperature, and this fault only reports in
the SPI register the moment VPWR has again risen above
VPWR(UV). To allow the outputs to remain ON between 36
and 58 V, overvoltage detection should be disabled (by
setting OV_dis = 1 in the GCR register).
Faults (overtemperature, overcurrent, severe short-circuit,
over and undervoltage) are reset if:
• VDD < VDD(FAIL) with VPWR in the normal voltage range
• VDD and VPWR are below the VSUPPLY(POR) voltage
threshold
• The corresponding SPI register is read after the
disappearance of the failure cause (and delatching)
Drain/source Overvoltage protection
The device tries to limit the Drain-to-Source voltage by
turning on the channel whenever VDS exceeds VDS(CLAMP).
When a fault occurs (SC, OC, OT, UV), the device is rapidly
switched Off (in t < tFAULT seconds), regardless the value of
the selected slew rate. This may induce voltage surges on
VPWR and/or the output pin (HS[x]) when connected to an
inductive line/load. Turning on the device also dissipates the
energy stored in the inductive supply line. This function
monitors overvoltage for VPWR > 30 V. For supply voltages
VPWR < 30 V, the device is protected from negative output
voltages by automatically turning on the channel. The feature
remains functional after device ground loss.
Supply Overvoltage Protection
In order to protect the device from excessive voltages on
the supply lines, the voltage between the device’s supply pins
(VPWR and the GND) is monitored. When the VPWR-to-GND
voltage exceeds the threshold VD_GND(CLAMP), the channel is
automatically turned on. The feature is not operational in
cases of ground loss.
Negative Output Voltage Protection
The device tries to limit the undervoltage on the output
pins HS[x] when turning off inductive loads. When the output
voltage drops below VCL, the channel is switched on
automatically. This feature is not guaranteed after a device
ground loss.
The energy dissipation capabilities of the circuit are
defined by the ECL [0:1] parameters. For inductive loads larger
than 20 µH, it is recommended to employ a freewheeling
diode. The three different overvoltage protection circuits are
symbolically represented in Figure 15. The values of the
clamping diodes are those specified in Table 4. Coupling
factor k represents the current ratio between the current in
the supply voltage measurement diode (zener) and the
current injected into the MOSFET’s gate to turn it on.
.
K.Iz
VDS(CLAMP)-Vth
HS[x]
DC
Vth
I2
VD_GND(Clamp)
IMEG
Load
VCL-Vth
GND
Figure 15. Supply and Output Voltage Protections
Reverse Voltage Protection on VPWR
The device can withstand reverse supply voltages on
VPWR down to -28 V. Under these conditions, the outputs are
automatically turned On and the channel’s On-resistance
(RDS(on)) is similar to that during positive supply voltages. No
additional components are required to protect the VPWR
circuit except series resistors (>8.0 k) between the direct
inputs IN[0:1] and VPWR in case they are connected to
VPWR. The VDD pin needs reverse voltage protection from
an externally connected diode (Figure 21).
Load and system Ground Loss
In case of load ground loss, the channel’s state does not
change, but the device detects an OpenLoad fault. In case of
a system GND loss, the channels are turned off.
Device Ground Loss
In the (improbable) case the device loses all of its three
ground connections (pins 14, 17, and 22), the channels’ state
(On/ Off), depends on several factors: the values of the series
resistors connected to the device pins, the voltage of the
direct input signals, the device’s momentary current
consumption (influenced by the SPI settings) and the state of
other high-side switches on the board when there are pins in
common like FSB, FSOB and SYNC. In the below
description, all voltages are referenced to the system
(module) GND.
When series resistors are used, the channel state can be
controlled by entering Fail-safe mode. The channels are
turned off automatically when the voltage applied to the IN[x]
input(s) through the series resistor(s) is not higher than VDD
and be turned on when the IN[x] input(s) are tied to VPWR.
Fail-Safe is entered under the following conditions:
• all unused pins are tied to the overall system’s GND
connection by resistors > 8.0 k.
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• any device pin connected to external system
components has a series resistors > 8.0 k (except pins
VPWR, VDD, HS[0], HS[1] and R(CSNS)>2.0 k)
• pins FSB, FSOB and SYNC are in the logic high-state
when they are shared with other devices. This means
that none of the other devices is in Fault or Fail-safe
mode, nor should current sensing be performed on any
one of them when GND is lost
When no series resistors are employed, the channel state
after GND loss is determined by the voltage on pins IN[0:1]
and the voltage shift of the device GND. Device GND shift is
determined by the lowest value of the external voltage
applied to either pin of the following list: CLOCK, FSB,
IN[0:1], FSOB, SCLK, CS,SI, SO, RSTB, CONF[0:1], SYNC,
CSNS. When the device GND voltage becomes logic low
(V(GND)< VIL), the SPI port continues to operate and the
device operates normally. When the GND voltage becomes
logic high (V(GND)> VIH), SPI communication is lost and Failsafe mode is entered. When the voltage applied to the IN[0:1]
input is VPWR, the channel is turned on when it is VDD, the
channel is turned off if (VDD - V(GND)) < VIH.
SUPPLY VOLTAGES OUT OF RANGE
VDD Out of Range
If the external VDD supply voltage is lost (or falls outside
the authorized range: VDD<VDD(FAIL)), the device enters Failsafe mode, provided the VDD_FAIL_en bit had been set.
Consequently, the contents of all SPI registers are reset. The
channels are then controlled by the direct inputs IN[0 :1] (if
VPWR is within the normal range). Since the VPWR pin
supplies the circuitry of the SPI, current sense and most of
the protective functions (overtemperature, overcurrent,
severe short-circuit, short to VPWR, and OpenLoad detection
circuitry), these faults are still detected and reported at the
FSB pin. However, without VDD, the SO pin is no longer
functional. The SPI registers can no longer be read and
detailed fault information is unavailable. Current sensing also
becomes unavailable. If VDD_FAIL_EN wasn’t set before VDD
was lost, the device remains SPI-controlled, even though the
SPI registers can’t be read. No current flows from the VPWR
to the VDD pin.
VPWR Supply Voltage Out of Range
In case VPWR is below the undervoltage threshold
VPWR(UV), it is still possible to address the device by the SPI
port, provided VDD is within the normal range. It does not
prevent other devices from operating when a device is part of
a daisy-chain. To accomplish this, RSTB must be kept at
logic [1]. When the device operates at supply voltages above
the maximum supply voltage (VPWR = 36 V), SPI
communication is not affected (see Overvoltage Detection
(enabled by default)). The internal pull-up and pull-down
current sources on the SPI pins are not operational.
Executing a Power-on-Reset (POR) sequence is
recommended when VPWR re-enters its authorized range. No
current flows from the VDD to the VPWR pin.
Loss of VPWR, Loss of VDD and Power-on-Reset (POR)
In typical applications (Figure 21 and Figure 22), an
external voltage regulator may be used to derive VDD from
VPWR. In wake mode, a Power-on-Reset (POR) sequence
executes and the POR bit (OD6 of the STATR register) is set
if:
1. VPWR > VPWR (POR), after a period VPWR < VPWR (POR)
(and VDD < VDD (POR) before and after)
2. VDD > VDD (POR) after a period with VDD < VDD (POR)
(VPWR < VPWR (POR) before and after)
POR is also set at the transition to wake-up (by setting
RSTB = 1 or IN[x] = 1) when VPWR > VPWR (POR) (before and
after)
or VDD >VDD(POR) (before and after). POR is not performed
when VPWR > VPWR (POR) after a period VPWR < VPWR (POR)
(and VDD > VDD (POR) permanently).
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(fc[x] = 0)
(OpenLoadOFF = 1
or OS = 1
or OV = 1)
OFF
(fc[x] = 1 and (OV = 0))
(OpenLoadOFF = 1
or OS = 1
or OV = 1)
(OpenLoadON = 1)
ON
(fc[x]= 0 or OV = 1)
Latched
OFF
(count = 16)
(Retry = 1)
(fc[x] = 0)
Auto-retry Loop
(after Retry Period and OV = 0 and OT = 0 and UV = 0)
(OV = 1)
OFF
(OpenloadOFF = 1
or OS = 1
or OV = 1
or UV = 1
or OT = 1) (fc[x] = 0)
(OpenLoadON = 1)
ON
(Retry = 1)
= > count = count+1
Figure 16. State Machine: Fault Occurrence and Auto-retry
AUTO-RETRY
The auto-retry circuitry automatically tries to turn on the
channel on a cyclic basis. Only faults of the latchable type
(overcurrent, severe short-circuit, overtemperature (OT), and
undervoltage (UV)) may activate auto-retry. For UV and OT
faults, auto-retry only starts after disappearance of the failure
cause (when auto-retry is enabled). The retry condition is
expressed by:
Retry[x] = OC[x] or SC[x] or OT[x] or UV.
If Auto-retry has been enabled, its mode of operation
depends on the settings of the auto-retry related bits (bits
D0...D3 of the SI-RETRY_s register, see Table 12) and the
available amount of auto-retries (bits OD7...OD4 of the SORETRY_s reg.). More details can be found in Amount Of
Auto-retries.
If Auto-retry is disabled, latchable faults immediately
latches upon their occurrence (see Protection and Diagnostic
Features).
Auto-retry Configuration
To enable the auto-retry function, bit retry_s (D0 of the SI
RETRY_s register) has to be set to the appropriate value.
Auto-retry is enabled for retry_s = 0 when the channel is
configured for lighting applications (CONF = 0). It is enabled
for retry_s = 1 for DC motor applications (CONF[x] = 1).
Table 10. Auto-Retry Activation for Lamps (CONF = 0)
and DC Motors (CONF = 1)
CONF[x]
Retry_s bit
auto-retry
0
0
enabled
0
1
disabled
1
0
disabled
1
1
enabled
If auto-retry is enabled, an auto-retry sequence starts
when the channel’s fault control signal is set to 1 (fc[x] = 1,
see Fault Delatching) and the retry condition applies
(Retry[x] = 1, see Auto-retry).
When a failure occurs (fault = 1), the channel
automatically switches on again after the auto-retry period.
The value of this period (tAUTO) is set through the SPI port
(bits D2 and D3 of the RETRY_s register, see Table 22).
When the failure cause disappears before expiration of the
available amount of auto-retries, the device behaves
normally (FSB = 1), but the retry counter keeps its current
value and the fault bit remains set until it is cleared. This
guarantees a maximum device availability without preventing
fault detection.
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FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
Amount Of Auto-retries
In case the device is configured for an unlimited amount of
auto-retries (Retry_unlimited_s = 1), auto-retry continues as
long as the device remains powered. The channel never be
latches off.
In case a limited amount of retries is selected (Retryunlimited_s = 0), auto-retry continues as long as the value of
the 4-bit auto-retry counter does not exceed 15 (bits
OD4...OD7 of the RETRY_s register). After 15 retries, the
Rfull bit of the STATR (OD4 for channel 0, OD5 for channel
1) register is set to logic high. The amount of available autoretries is then reduced to one. If the fault still hasn’t
disappeared at the next retry, the corresponding channel
switches off definitively and the fault is latched (FSB = 0, see
Protection and Diagnostic Features and Fault Delatching).
Any channel can be turned on at any moment during the
auto-retry cycle by performing a delatch sequence. However,
this does not reset the retry counter.
The value of the auto-retry counter can be read back in
Normal mode only (SO-RETRYR register bits OD7-OD4).
Reset of the Auto-retry Counter
Any one of the below events reset the retry counter:
• Fail-safe is entered (Fail-safe Mode)
• Sleep mode is left (Sleep Mode)
• POR occurs (Supply Voltages Out of Range)
• the retry function is set to unlimited (bit Retryunlimited_s = 1 (D1 = 1))
• the retry function is disabled (retry_s bit = D0 of the
RETRY_s register under goes a 1-0 transition for
CONF = 1 and a 0-1 transition for CONF = 0).
If the channel is latched at the moment the auto-retry
counter was reset (case 4), the channel is delatched, and be
turned on after one retry period (if retry was enabled).
Auto-retry and Overcurrent Duration
During the on-period following an auto-retry, the load
current profile is compared to the length and height of the
selected overcurrent threshold profile, as described in the
section on overcurrent protection (See Overcurrent Fault
(latchable fault)).
When the lighting profile is activated, the overcurrent
duration counter is reset at each auto-retry (to allow
sustaining new inrush currents).
For DC motor mode however, it is only reset at the turn-off
event of the first PWM period without any overcurrent (see
Reset of the Duration Counter). Figure 16 gives a description
of the retry state machine with the various transitions
between operating modes.
DIAGNOSTIC FEATURES
Diagnostic functions OpenLoad-in-On state (OLON),
OpenLoad-in-Off-state (OLOFF) and output short-circuited to
VPWR (OS) are operational over the frequency and duty cycle
ranges specified in Table 5.
Occurrence of an OLON, OLOFF, or OS fault sets the
associated bit in the FAULTR_s register but does not trigger
automatic turn-off. Any of these diagnostic functions can be
disabled by setting OLON_dis_s = 1, OLOFF_dis_s = 1, or
OS_dis_s = 1 (bits D8...D6 of the CONFR reg.).
The functions are guaranteed over the specified ranges for
output capacitor values up to 22 nF (+/-20%).
Output shorted-to-VPWR Fault
The device detects short-circuits between the output and
VPWR. The detection is performed during the Off-state. The
output-shorted-to-VPWR fault-bit (OS_s) is set whenever the
output voltage rises above VOSD(THRES). The fault is reported
in real time on the FSB pin and saved by the OS_s bit.
Occurrence of this fault does not trigger automatic turn-off.
Even if the short-circuit disappears, the OS_s bit does not
clear until the FAULTR register is read. The function may be
disabled by setting OS_dis_s = 1. The function operates over
the duty cycle ranges specified in Diagnostic Features.
This type of event shall be limited to 1000 min during the
vehicle lifetime. In case of permanent output shorted to the
battery condition, it is needed to turn-on the corresponding
channel.
OpenLoad Detection In Off State
OpenLoad-in-OFF-state detection (OL_OFF) is performed
continuously during each OFF-state (both for CSR0 and
CSR1). This function is implemented by injecting a small
current into the load (IOLD(OFF)). When the load is
disconnected, the output voltage rises above VOLD(THRES).
OL_OFF is then detected and the OL_OFF bit in the FAULTR
register is set. If disappearance of the open load fault is
detected, the FSB output pin returns to a high immediately,
but the OL_OFF bit in the fault register remains set until it is
cleared by a read out of the FAULTR register. The function
may be disabled by setting OLOFF_dis_s = 1. The function
operates over the duty cycle ranges specified in section
Diagnostic Features.
OpenLoad Detection In On State (OL_ON)
OpenLoad-in-ON state detection (OLON) is performed
continuously during the On-state for CSR0 over the ranges
specified in section Diagnostic Features. An OpenLoad in On
state fault is detected when the load current is lower than the
OpenLoad current threshold IOLD(ON). This happens at
IOLD(ON) = 500 mA (typ.) for high current sense mode
(CSR0), and at 7.0 mA (typ.) for low current mode. FSB is
asserted low and the OLON bit in the fault register is set to 1
but the channel remains On. FSB goes high as soon as
disappearance of the failure cause is detected, but the
OL_ON bit remains set.
In high current mode (CSR0), OpenLoad in On state
detection is done continuously during the On-state and the
OLON-bit remains set even if the fault disappears.
In high current mode, the OLON-bit is cleared when the
FAULTR register is read during the Off state, even if the fault
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FUNCTIONAL DEVICE OPERATION
OPERATION AND OPERATING MODES
hasn't disappeared. The OLON bit is also cleared when the
FAULTR register is read during the ON state, provided the
failure cause (load disconnected) has disappeared.
In low current mode (CSR1), OL_ON is done periodically
instead of continuously and only operates when fast slew rate
is selected. When the internal PWM module is used with an
internal or external clock (case 1), the period is 150 ms (typ.).
When the direct inputs are used (case 2), the period is that of
the input signal. The detection instants in both cases are
given by the following:
1. In internal PWM (int./ext. clock), low current mode
(CSR1), OpenLoad-in-ON state detection is not
performed each switching period, but at a fixed
frequency of about 7.0 Hz (each tOLLED = 150 ms typ.).
The function is available for a duty cycle of 100%.
OLON detection is also performed at 7.0 Hz, at the first
turn-off event occurring 150 ms after the previous
OL_ON detection event (before OS and OL_OFF).
2. In direct input, low current mode (CSR1), OL_ON is
performed each switching period (at the turn-off
instant) but the duty cycle is restricted to the values.
Consequently, when the signal on the IN[x] pin has a
duty cycle of 100%, OL_ON is not performed. To solve
this problem, either the internal PWM function must be
activated with a duty cycle of 100%, or the channel’s
direct input must be disabled by setting Dir_dis_s = 1
(bit D5 of the CONFR-s register). The OLON-bit is only
reset when the FAULTR register is read after
occurrence of an OL_ON-detection event without fault
presence.
OpenLoad Detection in Discontinuous Conduction Mode
If small inductive loads (solenoids / DC motors) are driven
at low frequencies, discontinuous conduction mode may
occur. Undesired OpenLoad in On state errors may then be
detected, as the inductor current needs some time to rise
above the OpenLoad detection threshold after turn-on. This
problem can be solved by increasing the switching frequency
or by disabling the function and activating OpenLoad in Off
state detection instead.
When small DC motors are driven in discontinuous
conduction mode, undesired OpenLoad in Off state detection
may also occur when the load current reaches 0 A during the
Off state. This problem can be solved by increasing the
switching frequency or by enabling OpenLoad in Off state
detection only during a limited time, preferably directly after
turn-off (see Diagnostic Features). The signal on the SYNC
pin can be used to identify the turn-off instant.
CURRENT & TEMPERATURE SENSING
The scaled values of either of the output currents or the
temperature of the device’s GND pin (#14) can be made
available at the CSNS pin. To monitor the current of a
particular channel or the general device temperature, the
CSNS0_en and CSNS1_en bits in the General Configuration
Register (GCR) must be set to the appropriate values. When
overcurrent windows are active, current sensing is disabled
and the SYNCB pin remains high.
Instantaneous and Sampled Current Sensing
The device offers two possibilities for load current sensing:
instantaneous (synchronous) sensing mode and track & hold
mode (see Figure 9). In synchronous mode, the load current
is mirrored through the current sense pin (Output Current
Monitoring (CSNS)) and is therefore synchronous with it.
After turn-off, the current sense pin does not output the
channel current. In track & hold mode however, the current
sense pin continues to mirror the load current as it was just
before turn-off. Synchronous mode is activated by setting the
T_H_en bit to 0, and Track & Hold mode by setting the
T_H_en bit to 1.
Current Sense Ratio Selection
The load current is mirrored through the CSNS pin with a
sense ratio (Figure 17) selected by the CSNS_ratio bit in the
OCR register. To achieve optimal accuracy at low current
levels, the lower current sensing ratio, called CSR1, must be
selected. In that case, the overcurrent threshold levels are
decreased. The best accuracy that can be obtained for either
ratio is shown in Figure 18. The amount of current the CSNS
pin can sink is limited to ICSNS,MAX..The CSNS pin must be
connected to a pull-down resistor (470 Ohm < R(CSNS)
<10 kOhm, 1.0 kOhm typical), in order to generate a voltage
output. A small low-pass filter can be used for filtering out
switching transients (Figure 21). Current sensing operates
for load currents up to the lower overcurrent threshold (OCLx
A).
Synchronous Current Sensing Mode
For activation of synchronous mode, T_H_en must be set
to 0 (default). After turn-on, the CSNS output current
accurately reflects the value of the channel’s load current
after the required settling time. From this moment on (CSNS
valid), the SYNC pin goes low and remain low until a switch
off signal (internal/external) is received. This allows
synchronization of the device’s current sensing feature with
an external process running on a separate device (see
Current Sense Synchronization (SYNC)). After turn-off, the
load current does not flow through the switch, and the load
current cannot be monitored.
Track & Hold Current Sensing Mode
In Track & Hold mode (T&H) (T_H_en = 1), conversely
from synchronous mode, the CSNS output current is
available even after having switched off the load. This feature
is useful when the device operates autonomously (internal
clock/PWM), since it allows current monitoring without any
synchronization of the device. An external sample and hold
(S/H) capacitor is not required. After turn on, the CSNS
output current reflects the channel’s load current with the
specified accuracy after occurrence of the negative edge on
the SYNC pin, as in synchronous mode (see Current Sense
Synchronization (SYNC)). However, at the switch-off instant,
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the last observed CSNS current is sampled and its value
saved, thanks to an internal S/H capacitor. The SYNC pin
goes high (SYNC = 1). If the channel on which Track & Hold
current sensing is performed is changed to another, the
internal S/H hold capacitor is first emptied and then charged
again to allow current monitoring of the other channel.
Consequently, T&H current monitoring of a channel is lost
when this channel is in the Off state at the moment the
current is monitored on the other channel. Track & Hold mode
should not be used for frequencies below 60 Hz.
.
Figure 17. Current Sensing Ratio Versus Output Current
Current Sense Errors
Current sense accuracy is adversely affected by errors of
the internal circuitry’s current sense ratio and offset. The
value of the current sensing output current can be expressed
with sufficient accuracy by the following equation:
ICSNS = (I(HS[x])+ I_LOAD_ERR_SYS +
I_LOAD_Err_RAND)*CSRX
(1)
with CSR0 = (1/5000 + εGAIN0) and CSR1 = (1/1666.6 +
εGAIN1).
The device’s offset error has a “systematic” and a
“random” component (I_LOAD_ERR_SYS, I_LOAD_ERR_RAND).
At low current levels, the random offset error may become
dominant. The systematic offset error is caused by
predictable variations with supply voltage and temperature,
and has a small but positive value with small spread. The
random offset error is a randomly distributed parameter with
an average value of zero, but with high spread. The random
offset error is subject to part-to-part variations and also
depends on the values of supply voltage and device
temperature. The device has a special feature called offset
compensation, allowing an almost complete compensation of
the random offset error (see ESR0_ERR). This offset
compensation technique greatly minimizes this error.
Computing the compensated current sensing value is
illustrated in the next sections.
Activation and Use of Offset Compensation
According to the settings of the OFP_s bit (in the
RETRYR_s register), opposite values of the random offset
error are generated. To compensate the random offset error,
two separate measurements with opposite values of the
random offset error are required. The measured values must
be saved by an external µ-processor. Compensation of the
random offset error is achieved by computing the average of
both. When a dedicated bit called Offset Positive (OFP = bit
D8 of the RETRYR_s register) is set to 1, the current sunk
through the CSNS pin (ICSNS) can be described by:
ICSNS1 = CSRx *(ILOAD+ I_LOAD_ERR_SYS+
(2)
I_LOAD_ERR_RAND)
When bit OFP is set to 0, ICSNS can be described by:
ICSNS2 = CSRx *(ILOAD+ I_LOAD_ERR_SYS I_LOAD_ERR_RAND)
(3)
The random offset term I_LOAD_ERR_RAND can be
computed from equations (2) and (3) as follows:
I_LOAD_ERR_RAND = (ICSNS1 - ICSNS2) / (2*CSRx)
(4)
The compensated current sense value ICSNS,COMP can be
obtained by computing the average value of measurements
ICSNS1 and ICSNS2 as follows:
ICSNS,COMP = (ICSNS1 + ICSNS2) / 2
(5)
When equations 2 and 3 are substituted in equation 5, the
random offset error cancels out, as shows eq. 6:
ICSNS,COMP = (I_LOAD_ERR_SYS + ILOAD) * CSRx
(6)
The systematic offset error I_LOAD_ERR_SYS is referenced
at the operating point 28 V and 25 °C. It can eventually be
fine tuned by performing a calibration. Gain errors at 25 °C
(= current sense ratio errors, represented by εGAIN0 and
εGAIN1) can also be reduced by performing a calibration at a
point in the range of interest. If calibration can not be done, it
is recommended to use the typical value of I_LOAD_ERR_SYS
(see ESR0_ERR).
Current Sense Error Model
The figures of uncompensated and compensated current
sense accuracy mentioned in Table 4 have been obtained
applying the error model of eq. 7 to the data:
ICSNS_MODEL = (I(HS[x]) + I_LOAD_ERR_SYS) * CSRx
ESRX_ERR = (ICSNS1 - ICSNS_MODEL)/ICSNS_MODEL
ESRX_ERR(COMP) = (ICSNS,COMP - ICSNS_MODEL)/
(7)
(8)
(9)
ICSNS_MODEL
The computation has been applied to each of the specified
measurement points. Model parameters I_LOAD_ERR_SYS and
CSRX have the nominal values, specified in ESR0_ERR.
The load current can be computed from this model as:
I(HS[x]) = ICSNS / CSRx - I_LOAD_ERR_SYS
(10)
(11)
I(HS[x]) = ICSNS,COMP / CSRx - I_LOAD_ERR_SYS
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LOGIC COMMANDS AND SPI REGISTERS
Using expression (11) generally gives more accurate
values than expression (10), since in expression (11),
random offset errors have been compensated.
time is displayed, for CSR0 and CSR1). Track & Hold mode
should not be used below f = 60 Hz.
Offset Compensation in Track & Hold Mode
In Track & Hold mode, the last observed sense current
(ICSNS) is sampled at the switch off instant. This takes into
account the currently active settings of the OFP_s offset
compensation bit. Changing the value of the OFP bit during
the switch’s off time produces an identical value of the current
sense output. Consequently, to implement the before
mentioned offset compensation technique, the channel must
have been turned on at least once prior to sensing the output
current with an opposite value of the OFP bit.
System Requirements for Current Monitoring
Current monitoring is usually implemented by reading the
(RC-filtered) voltage across the pull-down resistor connected
between the CSNS pin and GND (Figure 21). Therefore,
measurements (1) and (2) must be spaced sufficiently wide
apart (e.g. 5 time constants) to get stabilized values, but
close enough to be sure that the offset value wasn’t changed.
The A/D converter of the external micro controller that is used
to read the current sense voltage V(csns) must have
sufficient resolution to avoid introducing additional errors.
Figure 19. Track and Hold Current Sense Accuracy
Temperature Prewarning Detection
Accuracy with and without Offset Compensation
In Normal mode, the temperature prewarning (OTW) bit is
set (bit OD8 of the FAULTR register) when the observed
temperature of the GND pin is higher than TOTWAR (pin #14,
see Figure 3). The feature is useful when the temperature of
the direct surroundings of the device must be monitored. To
be able to reset the OTW-bit, the FAULTR register must be
read after the moment that temperature T °C < TOTWAR.
The sensing accuracy for CSR0 and CSR1, obtained
before and after offset compensation, is shown in Figure 18.
Switching State Monitoring
The switching state (On/Off) of the channels is reported in
real time by bits OUT[x] in the STATR register (bit OD0/OD1).
The Out[x] bit is asserted logic high when the channel is on
(output voltage V(HS[x]) higher than VPWR /2). When supply
voltage VPWR drops below 13 V, the reported switching state
may not correspond to the state of the channel’s control
signal hson[x] in case of an open load fault (see Factors
Determining the Channel’s Switching State).
.
EMC PERFORMANCES
Figure 18. Current Sense Accuracy versus Output
Current
In Track & Hold mode, the accuracy of the current sense
function is lowered according to the values shown in
Figure 19 (error percentage as a function of the switch-off
Specified EMC performance is board and module
dependent and applies to a typical application (Figure 21).
The device withstands transients per ISO 7637-2 /24 V. An
external freewheeling diode connected to at least one output
is required for sustaining ISO 7637-2 Pulse 1 (-600 V). To
withstand Pulse 2, at least one of the two channels must be
connected to a typical load (bulb). It withstands electric fields
up to 200 V/m and Bulk Current Injection (BCI) up to 200 mA
per ISO11452.
LOGIC COMMANDS AND SPI REGISTERS
SPI PROTOCOL DESCRIPTION
The SPI interface offers full duplex, synchronous data
transfer over four I/O lines: Serial Input (SI), Serial Output
(SO), Serial Clock (SCLK), and Chip Select (CSB).The SI /
SO pins of the device follow a first-in first-out (D15 to D0)
protocol. Transfer of input and output words starts with the
most significant bit (MSB). All inputs are compatible with
5.0 V or 3.3 V CMOS logic levels. Parity check is performed
after transfer of each 16-bit SPI data word.The SPI interface
can be driven without series resistors provided that voltage
06XS4200
42
Analog Integrated Circuit Device Data
Freescale Semiconductor
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
ratings on VDD and SPI pins (Table 3) aren’t exceeded.
Unused SPI-pins must be tied to GND, eventually by resistors
(see Device Ground Loss).
CSB
SCLK
SI
SO
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
OD15 OD14 OD13 OD12 OD11 OD10 OD9 OD8 OD7 OD6 OD5 OD4 OD3 OD2 OD1 OD0
1.RSTB
RST must
Notes 1.
mustbe
beininaalogic
logic[1]
[1]state
stateduring
duringdata
datatransfer.
transfer.
Notes
pinstarting
startingwith
withD15
D15 (MSB)
(MSB)and
andending
endingwith
withbit
bit D0.
D0.
2.Data
Dataenter
enterthe
theSI
SIpin
2.
3.Data
Dataare
areavailable
availableon
onthe
theSO
SOpin
pinstarting
startingwith
withbit
bit0D15
0D15 (MSB)
(MSB)and
andending
endingwith
withbit
bit00(OD0).
(OD0).
3.
Figure 20. 16-Bit SPI Interface Timing Diagram
SERIAL INPUT COMMUNICATION PROTOCOL
SPI communication requires that RSTB = high. SPI
communication is accomplished with 16-bit messages. A
valid message must start with the MSB (D15) and end with
the LSB (D0) (Table 11). Incoming messages are interpreted
according to Table 12. The MSB, D15, is the watchdog bit
(WDIN). Bit D14, Parity check (P), must be set such that the
total number of 1-bits in the SPI word is even (P = 0 for an
even number of 1-bits and P = 1 for an odd number). Bank
selection is done by setting bit D13. Bits D12: D10 are used
for register addressing. The remaining ten bits, D9 : D0, are
used to configure the device and activate diagnostic and
protective functions. Multiple messages can be transmitted
for applications with daisy chaining (or to validate already
transmitted data) by keeping the CSB pin at logic 0.
Messages with a length different from a multiple of 16 or with
a parity error is ignored. The device has thirteen input
registers for device configuration and thirteen output
registers containing the fault/device status and settings.
Table 12 gives the SI register function assignment. Bit names
with extension “_s” refer to functions that have been
implemented independently for each of both channels.
SERIAL PORT OPERATION
(MSB-first) at the serial clock frequency (SLCK). Bits at the SI
pin are clocked in at the same time. The first sixteen SO
register bits are those addressed by the previous SI word (bit
D13, D2…D0 of the STATR_s input register). At the end of
the chip select event (0-to-1 transition), the SI register
contents are latched. The second SPI word clocked out of the
Serial Output (SO) after the first CSB event represents the
initial SO register contents. This allows daisy chaining and
data integrity verification.
The message length is validated at the end of the CSB
event (0-to-1 transition). If it is valid (multiples of 16, no parity
error), the data is latched into the selected register. After
latch-in, the SO pin is tri-stated and the status register is
updated with the latest fault status information.
Daisy Chain Operation
Daisy-chaining propagates commands through devices
connected in series. The commands enter the device at the
SI pin and leave it by the SO pin, delayed by one command
cycle of 16 bits. To address a particular device in a daisy
chain, the CSB pin of all the devices in that chain has to be
kept low until the SPI message has arrived at its destination.
Once the command has been clocked in by the addressed
device, it can be executed by setting CSB = 1.
When Chip Select occurs (1-to-0 transition on the CSB
pin), the output register data is clocked out of the SO pin
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
43
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
Table 11. SI Message Bit Assignment
Bit n°
SI Reg. Bit
MSB
D15
Watchdog in (WDIN): Its state must be alternated at least once within the timeout period
.
D14
Parity (P) check. P-bit must be set to 0 for an even number of 1-bits and to 1 for an odd number.
D13
Selection between SI registers from bank 0 (0 = channel 0) and bank 1 (Table ).
.
.
.
D12 : D10
LSB
D9:D0
Bit Functional Description
Register address bits.
Used to configure the device and the protective functions and to address the SO registers.
Table 12. Serial Input register Addresses and Function Assignment
SI
Register D 15 D D D D D D9
14 13 12 11 10
SI Data
D8
D7
D6
D5
D4
D3
D2
D1
D0
STATR_s WDIN
P
A0
0
0
0
0
0
0
0
0
0
0
SOA2
SOA1
SOA0
PWMR_s WDIN
P
A0
0
0
1
0
ON_s
PWM7_s
PWM6_s
PWM5_s
PWM4_s
PWM3_s
PWM2_s
PWM1_s
PWM0_s
CONFR_s WDIN
P
A0
0
1
0
0
OS_dis_s
SR1_s
SR0_s
WDIN
P
A0
1
0
0
0
HOCR_s
PR_s
tOCH_s
tOCM_s
RETRY_s WDIN
P
A0
1
0
1
0
OFP_s
0
P
0
1
1
0
0
OCR_s
GCR
WDIN
OLON_dis OLOFF_di DIR_dis_s
_s
s_s
PWM_en_ PWM_en_
1
0
Clock_int_ CSNS_rati
s
o_s
DELAY2_s DELAY1_s DELAY0_s
OCH_s
OCM_s
OCL_s
0
0
(43)
Auto_perio Auto_perio Retry_unli
d1_s
d0_s
mited_s
retry_s
PARALLE
L
T_H_en
WD_dis
VDD_FAIL_e CSNS1_en CSNS0_en
OV_dis
n
CALR_s
WDIN
P
A0
1
1
1
0
1
0
1
0
1
1
0
1
1
contents
after
reset*
0
X
0
X
X
X
0
0
0
0**
0
0
0
0
0
0
* = RSTB = 0 or VDD(FAIL) after VDD = 5.0 V or POR
** = except bit D6 (PARALLEL) of the GCR register that is saved when VDD(FAIL) occurs, provided VDD = 5.0 V and VDD_FAIL_EN = 1 before
X = register address, P = parity bit
Notes
43. Bit D4 of RETRY_s Serial Input register
MC06XS4200FK = 0
MC06XS4200BFK = CONF_SPI_s
Setting bit D4 to 0 (CONF_SPI_s = 0) will configure the overcurrent profile as the CONF pin.
Setting bit D4 to 1 (CONF_SPI_s = 1) will configure the overcurrent profile as the opposite of CONF pin.
After device reset, the overcurrent profile is defined by the CONF input pin. The SPI-SO CONF bit reporting shall combine external
hardware configuration and SPI setting.
06XS4200
44
Analog Integrated Circuit Device Data
Freescale Semiconductor
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
Table 13. Serial Output Register Bit Assignment
bits D13,
D2, D1, D0
of the
Previous
STATR
SO Returned Data
S
O
A
3
S
O
A
2
S
O
A
1
S
O OD OD OD OD OD OD O
OD8 OD7
A 15 14 13 12 11 10 D9
0
OD6
0
0
0
0
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N
M
FAULT
A0 0
R_s
0
1
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N
OTW
M
PWMR_
A0 0
s
1
0
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N
M
CONFR
A0 0
_s
1
1
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
OLO
DIR_di SR1_s
N OS_
OLOFF
N_di
s_s
M dis_s
_dis_s
s_s
OCR_s A0 1
0
0
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N
M
HOC
Clock_i CSNS_ tOCH_
PR_s
R_s
nt_s
ratio_s
s
RETRY
A0 1
R_s
0
1
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N
M
OFP
STATR
OV
OD5
OD4
OD3
OD2
OD1
OD0
UV
POR
R_FUL R_FUL
L1
L0
FAULT1
FAULT0
OUT1
OUT0
0
0
OLON OLOFF
_s
_s
OS_s
OT_s
SC_s
OC_s
PWM3_s
PWM2_s
PWM1_s
PWM0_s
SR0_s
DELAY2_s
tOCM_s
OCH_s
ON_ PWM PWM6 PWM5 PWM4
s
7_s
_s
_s
_s
R3
R2
R1
R0
DELAY1_ DELAY0_
s
s
OCM_s
Auto_period Auto_period0 Retry_unli
1_s
_s
mited_s
GCR
0
1
1
0
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N PWM PWM PARAL T_H_e WD_di VDD_Fail_e
n
s
n
M _en_ _en_ LLEL
1
0
CSNS1_en
CSNS0_e
n
DIAGR
0
1
1
1
WDI
SOA SOA SO
PF
N
3
2
A1
SO
A0
N
M
IN0
CLOCK_fail
CAL_fail1
0
0
0
0
content
s after N/ N/ N/ N/
reset or A A A A
failure*
0
0
0
0
0
CON CON
F1
F0
0
0
ID1
ID0
IN1
0**
0***
0
OCL_s
retry_s
OV_dis
CAL_fail0
0
0
* = RSTB = 0 or VDD(FAIL) after VDD = 5.0 V, or POR
** = except bit D6 (PARALLEL) of the GCR register that is saved when VDD(FAIL) occurs provided VDD = 5.0 V and VDD_Fail_en = 1 before
*** = except bit D7 (POR) of the STATR register that is saved when VDD(FAIL) occurs after VDD = 5.0 V and VDD_Fail_en = 1 (fail-safe
mode)
x = register address, PF = parity Fault
SI REGISTER ADDRESSING
The address in the title of the following sections (A0xxx)
refer to bits D[13:10] of the SPI word required to address the
associated SI register. Bit A0 = D13 selects between
registers of bank 0 and bank 1 (Table 14). The function
assignment of register bits D[8:0] is described in the
associated section. The “_s” behind a register name
indicates that the variable applies to the register contents of
both banks.
Table 14. Value of bit A0 Required for Addressing
Register Banks 0 or 1
Value A0 (D13)
Bank
0
0 = channel 0 (default)
1
1 = channel 1
ADDRESS A0000 — STATUS REGISTER (STATR_S)
To read back the contents of any of the 13 SO registers,
bits D[13:10] of the channel’s SI STATR register must be set
to A0000 and bits D[2:0] in the same SPI word to the address
of the desired SO register. The SO registers thus addressed
are: STATR, FAULTR_s, PWMR_s, CONFR_s, OCR_s,
RETRY_s, GCR, and DIAGR (Table 13).
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
45
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
ADDRESS A0001— PWM CONTROL REGISTER
(PWMR_S)
The PWMR_s register contents determines the value of
the PWM duty cycle at the output (Table 12), both for internal
and external clock signals.
Bit D8 must be set to 1 to activate this function. The
desired value of duty cycle is obtained by setting Bits D7:D0
to one of the 256 levels as shown in Table 7.To start the
PWM function at a known point in time, the PWM_en_s bit
(both in the GCR register) must be set to 1.
ADDRESS A0010— CHANNEL CONFIGURATION
REGISTER (CONFR_S)
The CONFR_s is used to select the appropriate value of
slew rate and turn-ON delay. The settings of Bits D[8:6]
determine the activation of OpenLoad and short-circuit (to
VPWR) detection. Bit D13 ( = A0) of the incoming SPI word
determines which of both CONFR registers is addressed
(Table 14).
Setting bit D8 (OS_dis_s) to logic [1] disables detection of
short-circuits between the channel’s output pin and the
VPWR pin. The default value [0] enables the feature.
Setting bit D7 (OLON_dis_s) to logic [1] disables detection
of OpenLoad in the On state for the selected channel. The
default value [0] enables this feature (Table 15).
Setting bit D6 (OLOFF_dis_s) to logic [1] disables
detection of OpenLoad in the OFF state. The default value [0]
enables the feature, see Table 15.
Table 15. Selection of OpenLoad Detection Features
OLON_dis_s
(D7: On state)
OLOFF_dis_s
(D6: Off state)
Selected OpenLoad
Detection function
0
0
both enabled (default)
0
1
Off state detection disabled
1
0
On state detection disabled
1
1
Both disabled
Setting bit D5 (DIR_DIS_s) to logic [0] enables direct
control of the selected channel. Setting bit D5 to logic [1]
disables direct control. In that case, the channel state is
determined by the settings of the internal PWM functions.
D4:D3 bits (SR1_s and SR0_s) control the slew rate at
turn on and turn off (Table 16). The default value ([00])
corresponds to the medium slew rate. Rising and falling edge
slew rates are identical.
Table 16. Slew Rate Selection
SR1_s (D4)
SR0_s (D3)
Slew Rate
0
0
medium (default)
0
1
low
1
0
high
1
1
medium SR < SR < high SR
Delaying a channel’s turn-On instant with respect to the
other is accomplished by setting bits D2 : D0 of the PWMR_s
register to the appropriate values. Switch On is delayed by
the number of (internal/external) clock periods shown in
Table 8. Refer to the section Programmable PWM module.
ADDRESS A0100 — OVERCURRENT PROTECTION
CONFIGURATION REGISTER (OCR_S)
The contents of the OCR_s registers determines operation
of overcurrent, current sensing, and PWM related functions.
For each load type (bulb or DC motor), a different kind of
overcurrent profile exists (see Overcurrent Protection Profile
for Bulb Applications). For lighting mode, the overcurrent
profile is defined by three different thresholds each of which
is active over a dedicated time slot. These thresholds are
called the higher (= I_OCH), the middle (= I_OCM) and the
lower (= I_OCL) threshold. The DC motor profile only has two
thresholds (I_OCH and I_OCL).
Each threshold can be set to two different values, except
I_OCL that can be set to three different values (I_OCL1, I_OCL2,
I_OCL3). Setting the low current sense ratio (CSR1) reduces
the values of all the overcurrent thresholds by a factor of
three. The terminology is defined as follows: I_OCxy_z stands
for overcurrent threshold x (x = I_OCH, I_OCM or I_OCL) that
can be set to two or three different values, selected by y
(y = 1, 2, (or 3)). The previously selected current sense ratio
(z = 0 for CSR0 and z = 1 for CSR1) further determines the
shape of the applicable overcurrent protection profile, see:
I_OCH1_0.
Setting bit D8 (HOCR_s) to 0 activates overcurrent level
I_OCL1, the highest of the 3 levels, regardless the value of the
D0 bit. Setting HOCR to 1 activates the medium level I_OCL2
when D0 = 0, and the lowest level I_OCL3 when D0 = 1
(Table 21). When overcurrent windows are active, current
sensing is not available.
Bit D7 (PR_s) controls which of two divider values are
used to create the PWM frequency from the external clock.
Setting bit D7 to 1 causes the external clock to be divided by
512. When PR_s = 0, the divider is 256.
Setting bit D6 (Clock_int_s) activates the internal clock of
the selected channel. The default value [0] configures the
PWM module to use an external clock signal.
Setting bit D5 (CSNS_ratio_s) to 1 activates the “lowcurrent” current sense ratio CSR1, optimal for measuring
currents in the lowest range. The default value [0] activates
the “high-current” sensing ratio CSR0 (Table 17).
06XS4200
46
Analog Integrated Circuit Device Data
Freescale Semiconductor
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
Table 17. Current Sense Ratio Selection
Table 20. OCM Current Threshold Selection
CSNS_ratio_s (D5)
Current Sense Ratio
OCM_s (D1)
OCM current threshold
0
CRS0 (default)
0
I_OCM1_s (default)
1
CRS1
1
I_OCM2_s
The width of the overcurrent protection window(s) is
controlled by bits D4 and D3 (tOCH_s and tOCM_s), and also
depends on the load type configuration as shown in Table 18.
(CONF[x] = 0: bulb, CONF[x] = 1: DC motor).
The lighting profile has two adjacent windows the width of
which is compatible with typical bulb inrush current profiles.
The width of the first of these windows is either tOCH1 or
tOCH2. The width of the second window is either tOCM1_L or
tOCM2_L (see Table 18).
The DC motor profile has one overcurrent window defined
by two different thresholds (I_OCH and I_OCL) as illustrated by
Figure 6. In this case, the maximum overcurrent duration is
selected among four values: tOCM1_M, tOCM2_M, tOCH1, and
tOCH2.
Table 18. Dynamic Overcurrent Threshold Activation
Times for Bulb -and DC motor profiles
CONF[x]
tOCH_s (D4)
tOCM_s (D3)
Selected threshold
activation times
0
0
0
tOCH1 and tOCM1_L
0
0
1
tOCH1 and tOCM2_L
0
1
0
tOCH2 and tOCM1_L
0
1
1
tOCH2 and tOCM2_L
1
0
0
tOCM1_M
1
0
1
tOCM2_M
1
1
0
tOCH1
1
1
1
tOCH2
Bit D2 (OCH_s) selects the value of the higher (upper)
overcurrent threshold among two values. The default
value [0] corresponds to the highest value, and [1] to the
lowest value (Table 19).
Table 19. OCH Upper Current Threshold Selection
OCH_s (D2)
I_OCH current threshold
0
I_OCH1_s (default)
1
I_OCH2_s
Bit D1 (OCM_s) sets the value of the middle overcurrent
threshold. The default value [0] corresponds to the highest
value, and [1] to the lowest value (Table 20). In DC motor
mode, there is no middle overcurrent threshold and the value
of this bit has no influence.
Bit D0 (OCL_s) and D8 (HOCR) set the value of the lowest
overcurrent threshold, as shown in Table 21.
Table 21. OCL Current Threshold Selection
HOCR (D8)
OCL_s (bit D0)
Selected OCL current
level
0
0
I_OCL1_x(default)
0
1
I_OCL1_x
1
0
I_OCL2_x
1
1
I_OCL3_x
ADDRESS A0101 — AUTO-RETRY REGISTER
(RETRYR_S)
The RETRYR_s register contents are used to set the
different auto-retry options (Auto-retry) and the offset
compensation feature of the current sense function.
Setting bit D8 to 1(OFP = 1) causes the random offset
current (and the overcurrent profile on the 06XS4200B) to be
added to the sensed current (pin CSNS). Setting bit D8 to 0
results in the offset current being subtracted from the sensed
current.
Setting D3 and D2 (Table 22) to the appropriate values
allows selection of the value of the auto-retry period among
four predefined values.
Table 22. Auto-Retry Period
Auto_period1_s
(D3)
Auto_period0_s
(D2)
Retry Period
0
0
tAUTO_00 (default)
0
1
tAUTO_01
1
0
tAUTO_10
1
1
tAUTO_11
Setting bit D1 to 1 (RETRY_unlimited_s = 1) results in an
unlimited number of auto retries, provided the auto-retry
function wasn’t disabled.
Setting bit D1 to 0 (RETRY_unlimited_s = 0) limits the
amount of auto retries to 16 (see Amount Of Auto-retries).
The value of the counter neither resets after delatching, nor
when the fault disappears.
Setting bit D0 (retry_s) enables or disable auto-retry,
accordingly to setting of the CONF pin.
For CONF[x] = 0 (Lighting profile configured), setting
retry_s = 1 disables auto-retry. The default value [0] enables
it.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
47
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
For CONF[x] = 1 (DC motor), setting retry_s = 1 enables
auto-retry. The default value [0] disables it.
For details, see Table 12.
ADDRESS 0110 — GLOBAL CONFIGURATION
REGISTER (GCR)
The GCR register is used to activate various functions and
diagnostic functions Table 12.
Setting bits D8 = 1 and D7 = 1 of the GCR register
(PWM_en_1 and PWM_en_0) activates the internal PWM
function of both channels simultaneously according to the
values of duty cycle and turn-on delays in the PWMR_s and
CONFR_s registers (Table 7). However, this option should
never be used to drive channels in parallel. To increase the
load current capability, the instructions in the section Parallel
Operation should be followed.
Setting bit D6 sets parallel mode (improved switching
synchronization between both channels). Only configuration
and diagnostic information of bank 0 (A0 = 0) is available in
this setting (see Parallel Operation).
Setting Bit D5 (T_H_en = 1) activates Track & Hold current
sensing mode. When T&H is activated, the value of the
channel’s load current is kept available after turn-off.
Setting bit D4 (WD_dis = 1) disables the SPI watchdog
function. A logic [0] enables the SPI watchdog.
Setting bit D3 (VDD_FAIL_EN = 1) enables or disables the
VDD failure detection. When enabled, the device enters Failsafe mode after VDD < VDD(FAIL).
Bits D6 (parallel bit), D2 and D1 set the different (current)
sensing options. The CSNS pin outputs a scaled value of the
selected channel’s load current, the sum of both currents or
the die temperature, according to the values in Table 23.
When the highest overcurrent range is selected (bit D8 of the
OCR register, HOCR = 0), the device’s CSNS pin only
outputs scaled values of a single channel’s load current.
Table 23. Current Sense Pin Functionality Selection
Activated Function at CSNS Pin
ADDRESS A0111 — CALIBRATION REGISTER
(CALR_S)
The internal clock frequency of both channels can be
calibrated independently. Setting the appropriate calibration
word in the CALR_s register (Table 12) puts the device in
calibration mode. The default switching frequency is 400 Hz,
but can be changed by applying a specific calibration
procedure. See Internal Clock & Internal PWM (Clock_int_s
bit = 1).
SO REGISTER ADDRESSING
The device has two register banks, each of which has five
channel-specific SO registers containing the channel’s
configuration and diagnostics status (Table 13). These
registers are FAULTR_s, PWMR_s, CONFR_s, OCR_s, and
RETRYR_s.
Global fault and diagnostic information are contained in
the following common SO-registers: STATR, GCR, and
DIAGR. All the SO registers can be addressed by setting the
appropriate bits in the SI-STATR_s register (bits D13, D2,
D1, D0). The value of the bit D13 determines which register
bank is addressed (bank 0 or 1). Data is made available the
next cycle after register addressing.
The output status register correctly reflects the contents of
the addressed SO register as long as CSB is low, except
when the data from the previous SPI cycle was invalid. In this
case, the device outputs the contents of the last successfully
addressed SO register.
SERIAL OUTPUT REGISTER ASSIGNMENT
The output register that is shifted out through the SO pin is
previously addressed by bits D13, D2, D1, and D0 of the
STATR_s SI register (Table 12). Table 13 gives the
functional assignment (OD15 : OD0) of each of the thirteen
SO register bits, preceded by the address of the SI STATR_s
required to address it.
• Bit OD15 (MSB) reports the state of the watchdog bit
from the previously clocked-in SPI message.
• Bit OD14 (PF, active 1) reports an eventual parity error
on the previously transferred SI register contents.
• Bits OD13:OD10 echo the state of bits D13, D2, D1, and
D0 (SOA3: SOA0) of the previously received SI word.
• Bit OD9: Normal mode (NM) reports the device state. In
Normal Mode, NM = 1.
• Bits OD8 : OD0 are the contents of the selected SO
register (addressed by bit D13 and bits D2 : D0 of the
previous SI STATR register).
D8
D6
D2
D1
x
x
0
0
disabled
0
x
0
1
current sensing on channel 0
0
x
1
0
current sensing on channel 1
0
x
1
1
temperature sensing
1
0
0
1
current sensing on channel 0
1
x
1
0
current sensing on channel 1
1
x
1
1
temperature
PREVIOUS ADDRESS SOA3 : SOA0 = 0000 (STATR)
1
1
0
1
current sensing summed currents of
channels 0 and 1
When bits SOA3…SOA0 of the previously received SI
STATR_s register = 0000, the SO STATR register is
addressed. Bits OD8: OD0 contain the relevant channel
information: Faults, channel state, and supply voltage errors.
• Bits OD8: OD6 report failures common to both channels
• Bit OD8 = OV = 1: overvoltage fault
• Bit OD7 = UV = 1: undervoltage fault
Setting bit D0 (OV_dis = 1 of the GCR reg.) disables
overvoltage protection. Setting this bit to [0] (default), enables
it.
06XS4200
48
Analog Integrated Circuit Device Data
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FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND SPI REGISTERS
• Bit OD6 = POR = 1: power-on reset (POR) has occurred
Power-ON-Reset occurs when VPWR < VSUPPLY(POR). The
OV, UV, and POR bits can be reset by reading the STATR
register.
Bits OD5: OD4 (Rfull) of the STATR register are set to logic
[1] when the auto-retry counter of the corresponding channel
is full. These bits are automatically cleared by resetting the
corresponding auto-retry counter (see Reset of the Auto-retry
Counter)
Bits OD3 (FAULT1) and OD2 (FAULT0) are set to logic [1]
when channel-specific (non-generic) faults are detected:
FAULTs = OC_s + SC_s + OT_s + OS_s + OLOFF_s +
OLON_s.
The FAULTs bit can be reset by reading out the common
STATR register or the individual FAULTR_s register
(provided the fault has disappeared).
Bits OD1: OD0 (OUT1 and OUT0) report the channel’s
switching state (On/Off) in real time.
PREVIOUS ADDRESS SOA3 : SOA0 = A0001
(FAULTR_S)
Bit OD8 of both Fault registers (FAULTR_s) is set
simultaneously when the overtemperature prewarning
(OTW) condition occurs, but the channels are not switched
off (temperature of the common GND pin (#14)> TOTWAR).
Reading either FAULT register clears both OTW bits.
Bits OD5: OD0 of the Fault register (FAULTR_s) report the
faults that occurred on the channel previously selected by bit
SOA3 = A0 (Table 14).
• bit OD0 = OC_s: overcurrent fault on channel s,
• bit OD1 = SC_s: severe short-circuit on channel s,
• bit OD3 = OS_s: output shorted to VPWR on channel s,
• bit OD4 = OLOFF_s: open load in OFF state on channel s,
• bit OD5 = OLON_s: open load in ON state on channel s.
(The threshold value above which this fault is triggered
depends on the selected current sense ratio; for CSR0 @
500 mA typ. and for CSR1 @ 7.0 mA typ.).
The Fault Status pin (FS) is set to 0 (active Low) upon
occurrence of any of the above mentioned faults. Latched
faults can only be delatched by the procedure described in
Fault Delatching.
The FAULTR_s register is reset when it is read out,
provided that the failure cause has disappeared and latched
faults have been delatched.
PREVIOUS ADDRESS SOA3 : SOA0 = A0010
(PWMR_S)
The device outputs the contents of the addressed
PWMR_s register (A0 = 0 for bank 0 and A0 = 1 for bank 1).
PREVIOUS ADDRESS SOA3 : SOA0 = A0011
(CONFR_S)
The device outputs the contents of the addressed
CONFR_s register (A0 = 0 for bank 0 and A0 = 1 for bank 1).
PREVIOUS ADDRESS SOA3 : SOA0 = A0100
(OCR_S)
The device outputs the contents of the addressed OCR_s
register (A0 = 0 for bank 0 and A0 = 1 for bank 1).
PREVIOUS ADDRESS SOA3 : SOA0 = A0101
(RETRYR_S)
The device outputs the contents of the addressed
RETRYR_s register (A0 = 0 for bank 0 and A0 = 1 for bank 1).
Bit OD8 contains the value of the OFP bit (offset positive),
used for current sense offset compensation. Bits OD7: OD4
contain the real time value of the auto-retry counter. When
these bits contain [0000], either auto-retry has not been
enabled or Auto-retry did not occur.
PREVIOUS ADDRESS SOA3 : SOA0 = 0110 (GCR)
The device outputs the contents of the General
Configuration Register (GCR) common to both channels.
PREVIOUS ADDRESS SOA3 : SOA0 = 0111
(DIAGR_S)
Bit OD8 ( Ch. 1 = CONF1) and bit OD7 ( Ch. 0 = CONF0)
of the DIAGR_s register contain the values of the channels’
configuration bits (0 = bulb, 1 = DC motor)
Bits OD6:OD5 contain the Product Identification (ID)
number, equal to 10 for the present dual 6.0 mOhm product.
Bits OD4:OD3 report the logic state of the direct inputs
IN[1:0] in real time (1 = On, 0 = OFF), OD4 = Ch. 1,
OD3 = Ch. 0.
Bit OD2 reports a logic [1] in case an external clock error
occurred (if an external clock was selected by Clock_int = 0)
Bit OD1:OD0 report logic [1] in case a calibration failure
occurred during calibration of a channel’s internal clock
period.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
49
TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
Figure 21 shows the electrical circuit of a typical truck
application. A 70 W lamp and 120 W DC motor are driven. As
an example, an external circuit is added that takes over load
VPWR
control in case Fail-safe mode is activated (FSOB goes low).
This circuit allows keeping full control of both channels in
case of SPI failure.
VDD
Voltage regulator
100 nF
10 µF
10 µF
100 nF
VPWR
VDD
VPWR
VDD
VDD
10 k
MCU
100 nF
10 k
VDD
100 nF
I/O
CLOCK
I/O
FSB
IN0
IN1
SCLK
CSB
I/O
SO
SI
8 k2
75 k
GND
A/D
A/D
FSOB
SCLK
CSB
RSTB
SI
SO
CONF0
CONF1
SYNC
CSNS
1.0 k2
22 nF
2.0 k
VPWR
VDD
100 k
10 k
1.0 µF
HS0
06XS4200
22 nF
LOAD 0
HS1
22 nF
M
LOAD 1
GND
10 k
VPWR
External Control Circuitry
direct controls (pedals, handles, etc.)
Figure 21. Typical Application with Two Different Load Types
06XS4200
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Analog Integrated Circuit Device Data
Freescale Semiconductor
TYPICAL APPLICATIONS
.
VPWR
VDD
Voltage regulator
100 nF
10 µF
10 µF
100 nF
VPWR
VDD
VPWR
VDD
VDD
10 k
100 nF
100 nF 1.0 µF
10 k
VDD
I/O
CLOCK
I/O
FSB
IN0
IN1
MCU
SCLK
CSB
I/O
SO
SI
75 k
75 k
A/D
GND
VPWR
VDD
100 k
A/D
1.0 k2
22 nF
FSOB
SCLK
CSB
RSTB
SI
SO
CONF0
CONF1
SYNC
CSNS
HS0
22 nF
06XS4200
M
LOAD
HS1
GND
2.0 k
10 k
VPWR
External Control Circuitry
direct controls (pedals, handles,...)
Figure 22. Two Channels in Parallel/Recommended External Current Sense Circuit
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
51
PACKAGING
SOLDERING INFORMATION
PACKAGING
SOLDERING INFORMATION
The 06XS4200 is packaged in a surface mount power
package (PQFN), intended to be soldered directly on the
printed circuit board.
The maximum peak temperature during the soldering
process should not exceed 260 °C for 10 seconds maximum
duration.
The AN2467 provides guidelines for Printed Circuit Board
design and assembly.
MARKING INFORMATION
The device is identified by the part number: 06XS4200.
Device markings indicate information on the week and
year of manufacturing. The date is coded with the last four
characters of the nine character build information
code (e.g. “CTKAH0929”). The date is coded as four
numerical digits where the first two digits indicate the year
and the last two digits indicate the week. For instance, the
date code “0929” indicates the 29th week of the year 2009.
PACKAGE MECHANICAL DIMENSIONS
Package dimensions are provided in package drawings. To
find the most current package outline drawing, go to
Package
Suffix
23-Pin PQFN
FK
www.freescale.com and perform a keyword search for the
drawing’s document number.
Package Outline Drawing Number
98ASA00428D
06XS4200
52
Analog Integrated Circuit Device Data
Freescale Semiconductor
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
53
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
54
Analog Integrated Circuit Device Data
Freescale Semiconductor
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
55
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
56
Analog Integrated Circuit Device Data
Freescale Semiconductor
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
57
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
58
Analog Integrated Circuit Device Data
Freescale Semiconductor
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
59
PACKAGING
PACKAGE MECHANICAL DIMENSIONS
FK SUFFIX
23-PIN PQFN
98ASA00428D
ISSUE B
06XS4200
60
Analog Integrated Circuit Device Data
Freescale Semiconductor
REVISION HISTORY
REVISION HISTORY
REVISION
DATE
DESCRIPTION OF CHANGES
1.0
8/2012
•
Initial Release
2.0
5/2013
•
•
Grammatical accuracy and form consistency changes made. No changes to content
Revised back page. Updated document properties. Added SMARTMOS sentence to first paragraph
3.0
4/2014
•
•
•
•
•
•
•
•
Added an Orderable Parts table
Added 06XS4200BFK to the ordering information
Introduction of parameters related to 06XS4200B device (Table 1).
Removed RDSON values at 1.0 A.
Rectification of the inversion between ∆tDLY values at slow and medium slew rate.
Removed ECl_rep values
Change the ECl_sing value
New VD_GND clamp value for 06XS4200B
4.0
4/2014
•
No technical changes. Revised back page. Updated document properties.
06XS4200
Analog Integrated Circuit Device Data
Freescale Semiconductor
61
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Freescale assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any
and all liability, including without limitation consequential or incidental damages. “Typical” parameters that may be
provided in Freescale data sheets and/or specifications can and do vary in different applications, and actual performance
may vary over time. All operating parameters, including “typicals,” must be validated for each customer application by
customer’s technical experts. Freescale does not convey any license under its patent rights nor the rights of others.
Freescale sells products pursuant to standard terms and conditions of sale, which can be found at the following address:
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Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off.
SMARTMOS is a trademark of Freescale Semiconductor, Inc. All other product or service names are the property of their
respective owners.
© 2014 Freescale Semiconductor, Inc.
Document Number: MC06XS4200
Rev. 4.0
4/2014