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L6360
IO-Link communication master transceiver IC
Datasheet - production data

Process control
Description
Features
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Supply voltage from 18 V to 32.5 V
Programmable output stages: high-side, lowside or push-pull (< 2 Ω)
Up to 500 mA L+ protected high-side driver
COM1, COM2 and COM3 mode supported
Additional IEC61131-2 type 1 input
Short-circuit and overcurrent output
protection through current limitation and
programmable cut-off current
3.3 V / 5 V, 50 mA linear regulator
5 mA IO-Link digital input
Fast mode I2C for IC control, configuration
and diagnostic
Diagnostic dual LED sequence generator
and driver
5 V and 3.3 V compatible I/Os
Overvoltage protection (> 36 V)
Overtemperature protection
ESD protection
Miniaturized VFQFPN 26L (3.5x5x1 mm)
package
Applications


Industrial sensors
Factory automation
May 2016
The L6360 is a monolithic IO-Link master port
compliant with PHY2 (3-wire) supporting COM1
(4.8 kbaud), COM2 (38.4 kbaud) and COM3
(230.4 kbaud) modes. The C/QO output stage is
programmable: high-side, low-side or push-pull;
also cut-off current, cut-off current delay time,
and restart delay are programmable. Cut-off
current and cut-off current delay time, combined
with thermal shutdown and automatic restart,
protect the device against overload and shortcircuit. C/QO and L+ output stages are able to
drive resistive, inductive and capacitive loads.
Inductive loads up to 10 mJ can be driven.
Supply voltage is monitored and low voltage
conditions are detected. The L6360 transfers,
through the PHY2(C/QO pin), data received from
a host microcontroller through the USART (IN
C/QO pin), or to the USART (OUT C/QI pin) data
received from PHY2 (C/QI pin). To enable full IC
control, configuration and monitoring (i.e. fault
conditions stored in the status register), the
communication between the system
microcontroller and the L6360 is based on a fast
mode 2-wire I2C. The L6360 has nine registers to
manage the programmable parameters and the
status of the IC. Monitored fault conditions are:
L+ line, overtemperature, C/Q overload, linear
regulator undervoltage, and parity check. Internal
LED driver circuitries, in open drain configuration,
provide two programmable sequences to drive
two LEDs.
DocID022817 Rev 5
This is information on a product in full production.
1/60
www.st.com
Contents
L6360
Contents
1
Block diagram.................................................................................. 6
2
Pin description ................................................................................ 7
3
Absolute maximum ratings............................................................. 9
4
5
Recommended operating conditions ........................................... 10
Electrical characteristics .............................................................. 11
6
Device configuration ..................................................................... 18
7
8
6.1
Introduction ..................................................................................... 18
6.2
Main features .................................................................................. 18
6.3
General description ......................................................................... 18
6.4
SDA/SCL line control ...................................................................... 18
6.5
Mode selection ................................................................................ 18
6.6
Functional description ..................................................................... 20
6.7
Communication flow ........................................................................ 20
6.8
I2C address ..................................................................................... 21
6.9
Internal register ............................................................................... 21
6.10
Start-up default configuration .......................................................... 31
6.11
Interrupt ........................................................................................... 33
6.12
Demagnetization ............................................................................. 33
6.12.1
Fast demagnetization ....................................................................... 34
6.12.2
Slow demagnetization ...................................................................... 35
I2C protocol .................................................................................... 37
7.1
Protocol configuration ..................................................................... 37
7.2
Operating modes............................................................................. 37
Physical layer communication ..................................................... 47
8.1
Transceiver ..................................................................................... 47
8.2
IEC 61131-2 type 1 digital inputs .................................................... 48
9
Diagnostic LED sequence generator and driver ......................... 49
10
Line regulator ................................................................................ 50
11
Application example...................................................................... 51
12
EMC protection considerations .................................................... 52
2/60
12.1
Supply voltage protection ................................................................ 52
12.2
I/O line protection ............................................................................ 54
DocID022817 Rev 5
L6360
Contents
13
Ordering information..................................................................... 56
14
Package information ..................................................................... 57
15
14.1
VFQFPN 26L (3.5x5x1 mm) package information........................... 57
14.2
Packing information ......................................................................... 58
Revision history ............................................................................ 59
DocID022817 Rev 5
3/60
List of tables
L6360
List of tables
Table 1: Pin description .............................................................................................................................. 7
Table 2: Absolute maximum ratings ........................................................................................................... 9
Table 3: Recommended operating conditions .......................................................................................... 10
Table 4: Thermal data ............................................................................................................................... 10
Table 5: Supply ......................................................................................................................................... 11
Table 6: Electrical characteristics - linear regulator .................................................................................. 14
Table 7: Electrical characteristics - logic inputs and outputs .................................................................... 14
Table 8: Electrical characteristics - LED driving ....................................................................................... 15
Table 9: Electrical characteristics - I2C (fast mode) .................................................................................. 15
Table 10: Main parameter typical variations vs. +/- 1% variation of Rbias value ..................................... 16
Table 11: Register addresses ................................................................................................................... 21
Table 12: ENCGQ: C/Q pull-down enable ................................................................................................... 24
Table 13: Icoq: C/QO HS and LS cut-off current ........................................................................................ 24
Table 14: tdcoq: C/QO HS and LS cut-off current delay time ..................................................................... 25
Table 15: trcoq: C/QO restart delay time .................................................................................................... 25
Table 16: tdbq: C/QI debounce time ........................................................................................................... 25
Table 17: ENCGI: I/Q pull-down enable ...................................................................................................... 26
Table 18: CQPDG: C/Q pull-down generator switching .............................................................................. 26
Table 19: L+COD: L+ cut-off disable ........................................................................................................... 26
Table 20: tDCOL: L+ HS cut-off current delay time ..................................................................................... 26
Table 21: tRCOL: L+ restart delay ............................................................................................................... 27
Table 22: Bit 1:0 = tdbi [1:0]: I/Q debounce time ........................................................................................ 27
Table 23: C/Q output stage configuration ................................................................................................. 28
Table 24: Parameter default configuration ............................................................................................... 31
Table 25: Register default configuration ................................................................................................... 31
Table 26: Current write mode direction bit ................................................................................................ 39
Table 27: Sequential write mode direction bit ........................................................................................... 41
Table 28: Read mode: register address ................................................................................................... 42
Table 29: Address register ........................................................................................................................ 46
Table 30: Linear regulator selection pin.................................................................................................... 50
Table 31: Supply voltage protection component description .................................................................... 52
Table 32: Refined supply voltage protection component description ....................................................... 53
Table 33: VH protection component description........................................................................................ 54
Table 34: Typical protection in IO-Link application component description ............................................. 54
Table 35: IO-Link and SIO application extended protection component description ............................... 55
Table 36: Ordering information ................................................................................................................. 56
Table 37: VFQFPN 26L (3.5x5x1.0 mm) package mechanical data ........................................................ 58
Table 38: Document revision history ........................................................................................................ 59
4/60
DocID022817 Rev 5
L6360
List of figures
List of figures
Figure 1: Block diagram .............................................................................................................................. 6
Figure 2: Pin connection (top through view) ............................................................................................... 7
Figure 3: Rise/fall time test setup ............................................................................................................. 16
Figure 4: Normalized rise and fall time vs. output capacitor value (typ. values in push-pull configuration)
.................................................................................................................................................................. 16
Figure 5: A master transmitter addressing a slave receiver with a 7-bit address (the transfer is not
changed) ................................................................................................................................................... 19
Figure 6: A master reads data from the slave immediately after the first byte ......................................... 19
Figure 7: Transfer sequencing .................................................................................................................. 20
Figure 8: I2C communication..................................................................................................................... 20
Figure 9: Status register............................................................................................................................ 22
Figure 10: Power-on bit behavior .............................................................................................................. 22
Figure 11: Overtemperature (OVT) bit behavior ....................................................................................... 23
Figure 12: Cut-off behavior ....................................................................................................................... 23
Figure 13: Control register 1 ..................................................................................................................... 24
Figure 14: Control register 2 ..................................................................................................................... 26
Figure 15: Configuration register .............................................................................................................. 27
Figure 16: LED1 registers ......................................................................................................................... 30
Figure 17: LED2 registers ......................................................................................................................... 30
Figure 18: Parity register........................................................................................................................... 30
Figure 19: Power stage, Q2 is not present on L+ output .......................................................................... 34
Figure 20: Fast demagnetization principle schematic. Load connected to L- .......................................... 34
Figure 21: Fast demagnetization waveform. Load connected to L- ......................................................... 35
Figure 22: Slow demagnetization block. Load connected to L- ................................................................ 35
Figure 23: Slow demagnetization waveform. Load connected to GND .................................................... 36
Figure 24: Device initialization .................................................................................................................. 37
Figure 25: Current write mode flow chart procedure ................................................................................ 38
Figure 26: Current write mode frames ...................................................................................................... 39
Figure 27: Sequential write mode flow chart procedure ........................................................................... 40
Figure 28: Sequential write mode frames ................................................................................................. 41
Figure 29: Microcontroller parity check calculus ....................................................................................... 41
Figure 30: Register sequence in sequential write mode ........................................................................... 42
Figure 31: Current read mode flow chart procedure ................................................................................. 43
Figure 32: Current read mode frames ...................................................................................................... 44
Figure 33: Current read communication flow ............................................................................................ 44
Figure 34: Sequential/random read mode ................................................................................................ 44
Figure 35: Sequential/random read communication flow ......................................................................... 45
Figure 36: Block diagram communication mode ...................................................................................... 47
Figure 37: System communication mode ................................................................................................. 47
Figure 38: C/Q or L+ channel cut-off protection ....................................................................................... 48
Figure 39: C/Q or L+ channel current limitation and cut-off protection with latched restart ..................... 48
Figure 40: LED drivers .............................................................................................................................. 49
Figure 41: Linear regulator ....................................................................................................................... 50
Figure 42: Linear regulator principle schematic ........................................................................................ 50
Figure 43: Application example ................................................................................................................ 51
Figure 44: Supply voltage protection with uni-directional Transil ............................................................. 52
Figure 45: Refined supply voltage protection ........................................................................................... 52
Figure 46: VH protection vs. VCC ............................................................................................................... 53
Figure 47: Typical protection in IO-Link applications ................................................................................ 54
Figure 48: IO-Link and SIO application extended protection .................................................................... 55
Figure 49: VFQFPN 26L (3.5x5x1.0 mm) package outline....................................................................... 57
Figure 50: VFQFPN 26L (3.5x5x1.0 mm) carrier tape outline .................................................................. 58
DocID022817 Rev 5
5/60
Block diagram
1
L6360
Block diagram
Figure 1: Block diagram
6/60
DocID022817 Rev 5
L6360
2
Pin description
Pin description
Figure 2: Pin connection (top through view)
Table 1: Pin description
Number
Name
1
VCC
2
Function
Type
IC power supply
Supply
L-
L- line (IC ground)
Supply
3
VH
Linear regulator supply voltage
Supply
4
VDD
Linear regulator output voltage
Output
5
SA1
Serial address 1
Input
6
SA2
Serial address 2
Input
7
Rbias
External resistor for internal reference
generation
Input
8
SEL
Linear regulator 3.3 V/5 V voltage selection.
Output is 5 V when SEL pin is pulled to GND
Input
9
ENC/Q
C/Q output enable
Input
10
INC/Q
C/Q channel logic input
Input
11
OUTHC/Q
C/Q channel logic output
Output
12
OUTHI/Q
I/Q channel logic output
Output
13
ENL+
L+ switch enable. When ENL+ is high the switch
is closed
14
IRQ
Interrupt request signal (open drain)
15
SCL
Serial clock line
Input
16
SDA
Serial data line
Input/output
17
RST
Reset - active low
Input
18
SA0
Serial address 0
Input
19
LED1
Status/diagnostic LED (open drain)
Output
20
LED2
Status/diagnostic LED (open drain)
Output
DocID022817 Rev 5
Input
Output
7/60
Pin description
8/60
L6360
Number
Name
21
L-
22
Function
Type
L- line (IC ground)
Supply
VCC
IC power supply
Supply
23
L+
L+ line
Supply
24
I/Q
I/Q channel line
Input
25
C/QI
Transceiver (C/Q channel) line
Input
26
C/QO
Transceiver (C/Q channel) line
Output
DocID022817 Rev 5
L6360
3
Absolute maximum ratings
Absolute maximum ratings
Table 2: Absolute maximum ratings
Symbol
Parameter
Value
VCC
Supply voltage
VSEL
Linear regulator selection pin voltage
VDD
Linear regulator output voltage
5.5
VH
Linear regulator input voltage
VCC
VSDA, SCL, SA0,
1, 2
Unit
VCLAMP
-0.3 to 4
I2C voltage
-0.3 to VDD + 0.3
VLED1,2
LED1,2 voltage
-0.3 to VDD + 0.3
VC/QI, VI/Q
V
C/QI, I/Q voltage
-0.3 to VCC + 0.3
VRST
Reset voltage
-0.3 to VDD + 0.3
VIRQ
IRQ voltage
-0.3 to VDD + 0.3
VRbias
External precision resistance voltage
-03 to 4
VESD
Electrostatic discharge (human body
model)
2000
ICLAMP
Current through VCLAMP in surge test
(1 kV, 500 Ω) condition
2
A
IC/QO, IL+
C/QO, L+ current (continuous)
Internally limited
A
IOUTC/Q,
IOUTI/Q
OUTC/Q, OUTI/Q output current
±5
mA
ISDA
I2C transmission data current (open drain
pin)
10
mA
IRQ
Interrupt request signal current
2(1)
A
ILED1,2
LED1, 2 current
10
mA
Eload
L+ demagnetization energy
10
mJ
PTOT
Power dissipation at TC = 25 °C
PLR
Linear regulator power dissipation
TJ
Junction operating temperature
TSTG
Storage temperature range
Internally limited
W
200
mW
Internally limited
-55 to 150
°C
Notes:
(1)Peak
value during fast transient test only.
DocID022817 Rev 5
9/60
Recommended operating conditions
4
L6360
Recommended operating conditions
Table 3: Recommended operating conditions
Max.
Unit
18
32.5
V
7
VCC
V
400
kHz
0.1%
kΩ
125
°C
Symbol
Parameter
Min.
VCC
Supply voltage
VH
Linear regulator input voltage
fSCL
SCL clock frequency
Rbias
Precision resistance
-0.1%
TJ
Junction temperature
40
Typ.
124
Table 4: Thermal data
Typ.
Unit
Thermal resistance, junction-to-case
6
°C/W
Thermal resistance, junction-to-ambient(1)
50
°C/W
Symbol
Parameter
Rthj-case
Rthj-amb
Notes:
(1)Mounted
10/60
on FR4 PCB with 2 signal Cu layers and 2 power Cu layers interconnected through vias.
DocID022817 Rev 5
L6360
5
Electrical characteristics
Electrical characteristics
(18 V < VCC < 30 V; -25 °C < TJ < 125 °C; VDD = 5 V; unless otherwise specified).
Table 5: Supply
Symbol
VCLAMP
Parameter
Voltage clamp
Test conditions
I = 5 mA
Min.
Typ.
Max.
36
Unit
V
VUV
Undervoltage on
threshold
16
17
VUVH
Undervoltage
hysteresis
0.3
1
18
V
V
VREGLN5H
Linear regulator
undervoltage
high threshold
SEL = L
4.3
4.7
VREGLN5L
Linear regulator
undervoltage
low threshold
SEL = L
3.6
4.2
VREG5HYS
Linear regulator
undervoltage
hysteresis
SEL = L
0.1
VREGLN33H
Linear regulator
undervoltage
high threshold
SEL = H
2.8
3.1
VREGLN33L
Linear regulator
undervoltage
low threshold
SEL = H
2.5
2.7
VREG33HYS
Linear regulator
undervoltage
hysteresis
SEL = H
0.1
V
V
V
VQTHH
C/QI and I/Q
upper voltage
threshold
10.5
12.9
V
VQTHL
C/QI and I/Q
lower voltage
threshold
8
11.4
V
VQHY
C/Q and I/Q
hysteresis
voltage
1
Vdemag
L+
demagnetization
voltage
I = 5 mA
VfHS
C/Q high-side
freewheeling
diode forward
voltage
I = 10 mA
0.5
V
VfLS
C/Q low-side
freewheeling
diode forward
voltage
I = 10 mA
0.5
V
DocID022817 Rev 5
-8.5
V
-6.5
-4.8
V
11/60
Electrical characteristics
Symbol
Parameter
VLTHOFF
L+ line
diagnostic lower
threshold
Test conditions
Min.
Typ.
Max.
Unit
9
10
11
V
VLTHY
L+ line
diagnostic
hysteresis
0.1
1
VLTHON
L+ line
diagnostic upper
threshold
10
11
IS
12/60
L6360
Supply current
IOFFCQ
OFF-state C/QO
current
ICOQ
C/QO low- and
high-side cut-off
current
OFF-state
ON-state VCC at 32.5 V
12
V
100
μA
4
mA
ENC/Q = 0, VC/Q = 0 V
Programmable
V
1
70
115
190
150
220
300
290
350
440
430
580
720
μA
mA
ILIMQ
C/QO low- and
high-side
limitation current
IOFFL
L+ OFF-state
current
ICOL
L+ cut-off
current
480
ILIML
L+ limitation
current
IINC/Qi
C/QI pull-down
current
IINI/Q
I/Q pull-down
current
L+ high-side
ON-state
resistance
IOUT = 0.2 A at TJ = 25 °C
RONL
C/QO high-side
ON-state
resistance
IOUT = 0.2 A at TJ = 25 °C
RONCQH
C/QO low-side
ON-state
resistance
IOUT = 0.2 A at TJ = 25 °C
RONCQL
INC/Q to C/QO
propagation
delay time
Push-pull (CQO rising edge)
140
ns
tdINC/Q
Push-pull (CQO falling edge)
160
ns
ENC/Q to C/QO
propagation
delay time
Push-pull (CQO rising edge)
110
ns
tENC/Q
Push-pull (CQO falling edge)
225
ns
ENL+ = 0, VL+ = 0 V
Programmable
500
1600
mA
0
200
μA
730
mA
500
1600
mA
5
6.5
mA
2
3.3
mA
2
3
mA
580
IOUT = 0.2 A at TJ = 125 °C
2
2
Ω
Ω
0.6
IOUT = 0.2 A at TJ = 125 °C
Ω
Ω
1
IOUT = 0.2 A at TJ = 125 °C
DocID022817 Rev 5
Ω
1
1.2
Ω
L6360
Electrical characteristics
Symbol
Parameter
trPP
C/Q rise time in
push-pull
configuration
10% to 90%
tfPP
C/Q fall time in
push-pull
configuration
10% to 90%
trHS
C/Q rise time in
high-side
configuration
410
ns
tfHS
C/Q fall time in
high-side
configuration
700
ns
trLS
C/Q rise time in
low-side
configuration
750
ns
tfLS
C/Q fall time in
low-side
configuration
530
ns
tENL
ENL to L+
propagation
delay time
1
μs
trL+
L+ rise time
3
μs
tfL+
L+ fall time
25
μs
C/QI to OUTC/Q
(falling)
propagation
delay time
40
ns
C/QI to OUTC/Q
(rising)
propagation
delay time
100
ns
I/Q to OUTI/Q
(falling)
propagation
delay time
40
ns
I/Q to OUTI/Q
(rising)
propagation
delay time
100
ns
100
μs
150
μs
200
μs
250
μs
tdC/Qi
tdI/Q
tdcoq
C/QO low- and
high-side cut-off
current delay
time
Test conditions
Programmable
trcoq
C/QO restart
delay time
Programmable
tdbq
C/QI debounce
time
Programmable
DocID022817 Rev 5
Min.
Typ.
Max.
Unit
250
860
ns
290
860
ns
255 × tdcoq
Latched(1)
0
5
μs
μs
13/60
Electrical characteristics
Symbol
L6360
Parameter
Test conditions
Min.
Typ.
Max.
Unit
20
100
0
tdbl
I/Q debounce
time
5
Programmable
μs
20
100
tdcol
L+ cut-off
current delay
time
Programmable
500
trcol
L+ restart delay
time
Programmable
TJSD
Junction
temperature
shutdown
150
°C
TJHYST
Junction
temperature
thermal
hysteresis
20
°C
TJRST
Junction
temperature
restart threshold
130
°C
μs
0
64
ms
Latched
(1)
Notes:
(1)Unlatch
through I2C communication.
Table 6: Electrical characteristics - linear regulator
Symbol
VDD
ILIMR
Parameter
Test conditions
Min.
Typ.
Max.
Unit
SEL = L
4.84
5
5.13
V
SEL = H
3.22
3.3
3.37
V
Linear regulator output voltage
Linear regulator output current limitation
mA
65
Table 7: Electrical characteristics - logic inputs and outputs
Symbol
VIL
Input low-level voltage
VIH
Input high-level voltage
VIHIS
Input hysteresis voltage
IIN
14/60
Test conditions
Parameter
Input current
Min.
Typ.
Max.
Unit
0.8
V
V
2.2
V
0.2
VIN = 5 V
1
μA
0.5
V
VOL
Output low-level voltage
IOUT = -2 mA
VOH
Output high-level voltage
IOUT = 2 mA
VLIRQ
Open drain output lowlevel voltage
IOUT = 2 mA
DocID022817 Rev 5
V
VDD - 0.5 V
0.5
V
L6360
Electrical characteristics
Table 8: Electrical characteristics - LED driving
Symbol
VLED1,2
ILED
Test conditions
Parameter
Open drain output low-level voltage
ILED = 2 mA
LED1, 2 leakage current
VLED1 = VLED2 = 5 V
Min.
Typ.
Max.
Unit
0.5
V
nA
3
Table 9: Electrical characteristics - I2C (fast mode)
Symbol
Test conditions
Parameter
VIL(SDA)
SDA high level input
voltage
VIH(SDA)
SDA high level input
voltage
VIL(SCL)
SCL low level input
voltage
VIH(SCL)
SCL high level input
voltage
IIN
I2C SDA, SCL input
current
Min.
Max.
Unit
0.3
V
V
0.7 x VDD
0.3
V
0.7 x VDD
(0.1 x VDD) <VIN < (0.9 x VDD)
V
-10
10
μA
tr(SDA)
I2C SDA rise time
20 + 0.1 Cb
300
ns
tr(SCL)
I2C SCL rise time
20 + 0.1 Cb
300
ns
tf(SDA)
I2SDA fall time
20 + 0.1 Cb
300
ns
tf(SCL)
I2 C
20 + 0.1 Cb
300
ns
SCL fall time
ns
tsu(SDA)
SDA set-up time
100
th(SDA)
SDA hold time
tsu(STA)
Repeated start
condition setup
0.6
μs
tsu(STO)
Top condition set-up
time
0.6
μs
tw(START/STOP)
Stop to start condition
time (bus free)
1.3
μs
tw(SCLL)
SCL clock low time
1.3
μs
tw(SCLH)
SCL clock high time
0.6
μs
0.9
μs
Cb
Capacitance for each
bus line
400
pF
CI
Capacitance for each
I/O pin
10
pF
Values based on standard I2C protocol requirement.
DocID022817 Rev 5
15/60
Electrical characteristics
L6360
Figure 3: Rise/fall time test setup
Figure 4: Normalized rise and fall time vs. output capacitor value (typ. values in push-pull
configuration)
Table 10: Main parameter typical variations vs. +/- 1% variation of Rbias value
Parameter
Typ. variation vs. Rbias
Rbias [kΩ]
Symbol
122.74
124
125.24
Supply current
0.76%
0
-0.50%
IINC/Qi
Input current C/QI pin (5.5 mA)
0.93%
0
-0.93%
IINC/Qi
Input current C/QI pin (2.5 mA)
0.75%
0
-1.13%
IINI/Q
Input current I/Q pin (2.5 mA)
0.85%
0
-0.85%
tdcoq
C/QO low- and high-side cut-off current delay time
-2.44%
0
2.00%
ICOQ
C/QO low- and high-side cut-off current (115 mA)
1.19%
0
-1.28%
tdcol
L+ cut-off current delay time (500 µs)
-0.95%
0
0.47%
ICOL
L+ cut-off current
1.36%
0
-0.91%
trcol
L+ restart delay time
-0.93%
0
0.97%
VUV
Undervoltage ON-threshold
0.00%
0
0.00%
Is
16/60
DocID022817 Rev 5
L6360
Electrical characteristics
Parameter
Typ. variation vs. Rbias
Rbias [kΩ]
Symbol
122.74
124
125.24
VDD
Linear regulator output voltage (3.3 V)
-0.03%
0
0.03%
VDD
Linear regulator output voltage (5 V)
-0.02%
0
0.02%
ILIMQ
C/QO high-side limitation current
0.64%
0
-0.71%
ILIMQ
C/QO low-side limitation current
0.28%
0
-1.47%
ILIML
L+ limitation current
0.47%
0
-2.09%
VQTHH
C/QI and I/Q upper voltage threshold
0.00%
0
0.00%
VQTHL
C/QI and I/Q lower voltage threshold
0.00%
0
0.00%
VQHY
C/Q and I/Q hysteresis voltage
0.00%
0
0.00%
trPP
C/Q rise time in push-pull configuration
-1.59%
0
1.18%
tfPP
C/Q fall time in push-pull configuration
-2.14%
0
0.94%
tdINC/Q
INC/Q to C/QO propagation delay time
-1.44%
0
0.75%
tdINC/Q
INC/Q to C/QO propagation delay time
-2.36%
0
0.18%
tdC/Qi
C/QI to OUTC/Q propagation delay time
0.49%
0
1.13%
tdC/Qi
C/QI to OUTC/Q propagation delay time
1.82%
0
0.03%
tdbq
C/QI debounce time (100 µs)
-1.76%
0
1.50%
tdcoq
C/QO low- and high-side cut-off current delay time (200 µs)
-1.27%
0
2.00%
ICOQ
C/QO low-side cut-off current (220 mA)
0.39%
0
-1.56%
ICOQ
C/QO low-side cut-off current (350 mA)
0.36%
0
-1.43%
ICOQ
C/QO low-side cut-off current (580 mA)
0.65%
0
-1.72%
trcoq
C/QO restart delay time
-0.90%
0
0.97%
ICOQ
C/QO high-side cut-off current (220 mA)
0.84%
0
-0.84%
ICOQ
C/QO high-side cut-off current (350 mA)
1.38%
0
-0.69%
ICOQ
C/QO high-side cut-off current (580 mA)
1.08%
0
-1.08%
DocID022817 Rev 5
17/60
Device configuration
6
L6360
Device configuration
SDA and SCL configure the L6360 device through I2C.
6.1
Introduction
The I2C bus interface serves as an interface between the microcontroller and the serial I 2C
bus. It provides single master functions, and controls all I2C bus-specific sequencing,
protocol and timing. It supports fast I2C mode (400 kHz).
6.2
Main features




6.3
Parallel bus/I2C protocol converter
Interrupt generation
Fast I2C mode
7-bit addressing
General description
In addition to receiving and transmitting data, this interface converts it from serial to parallel
format and vice versa. The interface is connected to the I2C bus by a data pin (SDA) and a
clock pin (SCL).
6.4
SDA/SCL line control
SDA is a bi-directional line, SCL is the clock input. SDA should be connected to a positive
supply voltage via a current-source or pull-up resistor. When the bus is free, both lines are
HIGH. The output stages of the devices connected to the bus must have an open drain or
open collector output to perform the wired AND function. Data on the I2C bus can be
transferred to rates up to 400 Kbit/s in fast mode. The number of interfaces connected to
the bus is limited by the bus capacitance. For a single master application, the master's SCL
output can be a push-pull driver provided that there are no devices on the bus which would
stretch the clock. Transmitter mode: the microcontroller interface holds the clock line low
before transmission. Receiver mode: the microcontroller interface holds the clock line low
after reception. When the I2C microcontroller cell is enabled, the SDA and SCL ports must
be configured as floating inputs. In this case, the value of the external pull-up resistors
used depends on the application. When the I2C microcontroller cell is disabled, the SDA
and SCL ports revert to being standard I/O port pins. On the L6360, the SDA output is an
open drain pin.
6.5
Mode selection
Possible data transfer formats are:



The master transmitter transmits to the slave receiver. The transfer direction is not
changed
The slave receiver acknowledges each byte
The master reads data from the slave immediately after the first byte (see Figure 6: "A
master reads data from the slave immediately after the first byte"). At the moment of
the first acknowledge, the master transmitter becomes a master receiver and the slave
receiver becomes a slave transmitter
This first acknowledge is still generated by the slave. Subsequent acknowledges are
generated by the master. The STOP condition is generated by the master which sends a
not-acknowledge (A) just prior to the STOP condition.
18/60
DocID022817 Rev 5
L6360
Device configuration
Figure 5: A master transmitter addressing a slave receiver with a 7-bit address (the transfer is
not changed)
Figure 6: A master reads data from the slave immediately after the first byte
On the microcontroller, the interface can operate in the two following modes:


Master transmitter/receiver
Idle mode (default state)
The microcontroller interface automatically switches from idle to master receiver after it
detects a START condition and from master receiver to idle after it detects a STOP
condition. On the L6360 the interface can operate in the two following modes:


Slave transmitter/receiver
Idle mode (default state)
The interface automatically switches from idle to slave transmitter after it detects a START
condition and from slave transmitter to idle after it detects a STOP condition.
DocID022817 Rev 5
19/60
Device configuration
6.6
L6360
Functional description
By default, the I2C microcontroller interface operates in idle; to switch from default idle
mode to master mode a START condition generation is needed. The transfer sequencing is
shown in the picture below.
Figure 7: Transfer sequencing
6.7
Communication flow
The communication is managed by the microcontroller that generates the clock signal. A
serial data transfer always begins with a START condition and ends with a STOP condition.
Data is transferred as 8-bit bytes, MSB first. The first byte following the START condition
contains the address (7 bits). The 9th clock pulse follows the 8th clock cycle of a byte
transfer, during which the receiver must send an acknowledge bit to the transmitter.
Figure 8: I2C communication
Each byte is followed by an acknowledgment bit as indicated by the A or A blocks in the
sequence. A START condition immediately followed by a STOP condition (void message)
is a prohibited format.
20/60
DocID022817 Rev 5
L6360
6.8
Device configuration
2
I C address
Each I2C connected to the bus is addressable by a unique address. The I2C address is 7
bits long, and there is a simple master/slave relationship. The LSB of the L6360 address
can be programmed by means of dedicated IC pins (SA0, SA1 and SA2, which can be hard
wired to VDD or GND, or handled by μC outputs): the microcontroller can interface up to 8
L6360 ICs. The I2C inside the device has 5 pins:





SDA: data
SCL: clock
SA0: LSB of the L6360 address
SA1: bit 1 of the L6360 address
SA2: bit 2 of the L6360 address
The I2C L6360 IC address is:


Fixed part (4 MSBits): set to “1100”
Programmable part (3 LSBits) by hardware: from “000 to 111" connecting SAx pins to
GND or VDD
In the L6360 the SDA is an open drain pin.
6.9
Internal register
The L6360 has some internal registers to perform control, configuration, and diagnostic
operations. These registers are listed below:









Status register
Configuration register
Control register 1
Control register 2
LED1 register MSB
LED1 register LSB
LED2 register MSB
LED2 register LSB
Parity register
Each register is addressable as follows:
Table 11: Register addresses
Address
Register name
0000
Status register
0001
Configuration register
0010
Control register 1
0011
Control register 2
0100
LED1 MSB
0101
LED1 LSB
0110
LED2 MSB
0111
LED2 LSB
1000
Parity register
DocID022817 Rev 5
21/60
Device configuration
Status register
L6360
Read only
Reset value: [00000000]
Figure 9: Status register
The status register stores diagnostic information. It can be read to check the status of the
run-time of the device (faults, warning, transmission corrupted, etc.). When a fault condition
occurs, a bit (corresponding to the fault condition) in the status register is set and an
interrupt (via the IRQ pin) is generated. If there is no persistent fault condition, the status
register is cleared after a successful current read.
Bit 7 = PO: Power-on (L+ line)
This bit indicates the status of L+ line voltage. If the voltage goes under the lower threshold
(VLTHOFF) and ENL+ is high, the PO bit is set. It is reset after a successful current read if the
L+ voltage has returned above the upper threshold V LTHON and the read operation has
begun after the bit has been set. When the PO bit is high, IRQ is generated. During EN L+
transition (from low-level to high-level) and during L+ line voltage transition, a fault
condition is reported setting the PO bit and activating the IRQ pin. To reset the fault a
successful current read is necessary.
Figure 10: Power-on bit behavior
Bit 6 = not used: always at zero
Bit 5 = OVT: overtemperature fault
This bit indicates the status of the IC internal temperature. If the temperature goes above
the thermal shutdown threshold (T > TJSD) the OVT bit is set. It is reset after a successful
current read if the temperature has returned below the thermal restart threshold (T JDS TJHIST) and the read operation has begun after the bit has been set. When OVT bit is high,
the power outputs are disabled and IRQ is generated.
22/60
DocID022817 Rev 5
L6360
Device configuration
Figure 11: Overtemperature (OVT) bit behavior
Bit 4 = CQOL: C/Q overload
This bit is set if a cut-off occurs on the C/Q channel. It is reset after a successful current
read if the restart delay time (trcoq) has elapsed or the protection is latched (bit trcoq = 1). The
read operation should begin after the CQOL bit has been set. When CQOL bit is high, IRQ
is generated. When CQOL bit is high and the protection is latched (bit trcoq = 1 in control
register 1), the C/Q power output is disabled. See next figure.
Figure 12: Cut-off behavior
DocID022817 Rev 5
23/60
Device configuration
Bit 3 = LOL: L+ overload
L6360
This bit is set if a cut-off occurs on the L+ driver. It is reset after a successful current read if
the restart delay time (trcol) has elapsed or the protection is latched (bit trcol = 1 in control
register 2). The read operation should begin after the LOL bit has been set. When LOL bit
is high, IRQ is generated. When LOL bit is high and the protection is latched (bit t rcol = 1 in
control register 2), the L+ power output is disabled. The behavior is the same as the C/Q
driver (see Figure 12: "Cut-off behavior").
Bit 2 = not used: always at zero
Bit 1 = REG LN: linear regulator undervoltage fault
This bit is set in case of undervoltage of the linear regulator output (VREGLNL). It is reset after
a successful current read if the linear regulator output has returned to normal operation and
the read operation has begun after the bit has been set. When REGLN bit is high, IRQ is
generated.
Bit 0 = PE: parity check error
This flag is set if parity error occurs.
Control register 1
Read/write
Reset value: [00100001]
Figure 13: Control register 1
The control register holds the parameters to control the L6360.
Bit 7 = ENCGQ: C/QI pull-down enable
Table 12: ENCGQ: C/Q pull-down enable
ENCGQ
Pull-down generator status
0
Always OFF
If ENC/Q = 0
ON
If ENC/Q = 1
OFF
1
Bit 6:5 = ICOQ [1:0]: C/QO HS and LS cut-off current
This bit is used to configure the cut-off current value on the C/Q channel, as shown in the
following table.
Table 13: Icoq: C/QO HS and LS cut-off current
24/60
Icoq[1]
Icoq[0]
Typ.
0
0
115 mA
0
1
220 mA
1
0
350 mA
1
1
580 mA
DocID022817 Rev 5
L6360
Device configuration
Bit 4:3 = tdcoq [1:0]: C/QO HS and LS cut-off current delay time
The channel output driver is turned off after a delay (tdcoq) programmable by means of
these two bits.
Table 14: tdcoq: C/QO HS and LS cut-off current delay time
tdcoq[1]
tdcoq[0]
Typ.
0
0
100 µs
0
1
150 µs
1
0
200 µs
1
1
250 µs(1)
Notes:
(1)According
to power dissipation at 2 kHz switching, C < 1 μF and power dissipation 0.7 W.
Bit 2 = trcoq: C/QO restart delay time
After a cut-off event, the channel driver automatically restarts after a delay (t rcoq)
programmable by means of this bit.
Table 15: trcoq: C/QO restart delay time
trcoq
Typ.
0
255x tdcoq
1
Latched(1)
Notes:
(1)Unlatch
through I2C communication (reading or writing any internal register).
Bit 1:0 = tdbq [1:0]: C/QI debounce time
Debounce time is the minimum time that data must be in a given state after a transition. It
is a programmable time, and can be configured as shown in the following table.
Table 16: tdbq: C/QI debounce time
tdbq[1]
tdbq[0]
Typ.
0
0
0 µs
0
1
5 µs
1
0
20 µs
1
1
100 µs
Control register 2
Read/write
Reset value: [0x100001]
DocID022817 Rev 5
25/60
Device configuration
L6360
Figure 14: Control register 2
The control register holds the parameters to control the L6360.
Bit 7 = ENCGI: I/Q pull-down enable
Table 17: ENCGI: I/Q pull-down enable
ENCGI
Pull-down generator status
0
Always OFF
1
Always ON
Bit 5 = CQPDG: C/Q pull-down generator switching
In order to reduce consumption, it is possible to switch from default to low-power
configuration by resetting the CQPDG bit.
Table 18: CQPDG: C/Q pull-down generator switching
CQPDG
Pull-down generator status
0
IINI/Qi (input current C/QI pin) = 2.5 mA
1
IINC/Qi (input current C/QI pin) = 5.5 mA
Bit 4 = L+COD: L+ cut-off disable
The cut-off function on the L+ switch can be enabled or disabled according to the L+COD bit.
Table 19: L+COD: L+ cut-off disable
L+COD
L+ cut-off current status
0
Enabled
1
Disabled
As the cut-off function is intended to protect the integrated switches against overload and
short-circuit, disabling the cut-off is not recommended.
Bit 3 = tDCOL: L+ cut-off current delay time
The channel output driver is turned off after a delay (tDCOL) programmable by this bit.
Table 20: tDCOL: L+ HS cut-off current delay time
tDCOL
Typ.
0
500 µs
1
0 µs
Bit 2 = tRCOL: L+ restart delay
After a cut-off event, the channel driver automatically restarts again after a delay (t RCOL)
programmable by this bit.
26/60
DocID022817 Rev 5
L6360
Device configuration
Table 21: tRCOL: L+ restart delay
tRCOL
Typ.
0
64 ms
1
Latcheda
Bit 1:0 = tdbi [1:0]: I/Q debounce time
Debounce time is the minimum time that data must be in a given state after a transition. It
is a programmable time, and it can be configured as shown in the table below.
Table 22: Bit 1:0 = tdbi [1:0]: I/Q debounce time
tdbi[1]
tdbi[0]
Typ.
0
0
0 µs
0
1
5 µs
1
0
20 µs
1
1
100 µs
Configuration register
Read/write
Reset value: [100xxxxx]
Figure 15: Configuration register
The configuration register holds data to configure the L6360 IC.
Bit 7:5 = C/Q [2:0]: C/Q output stage configuration
a
Unlatch through I2C communication (reading or writing any internal register).
DocID022817 Rev 5
27/60
Device configuration
L6360
Table 23: C/Q output stage configuration
C/Q[2]
C/Q[1]
C/Q[0]
Configuration
Notes
0
0
0
OFF
HS and LS are OFF regardless of the state of ENC/Q
and INC/Q. The receiver is OFF regardless of the state
of ENC/Q.
Low-side
HS is always disabled. LS is ON when INC/Q is high
and ENC/Q is high, OFF in all other cases. Slow
asynchronous decay when the LS is turned off by
ENC/Q or in case of cut-off. The receiver is OFF when
ENC/Q is high: OUTC/Q is high. The receiver is ON
when ENC/Q is low: if C/QI is high, OUTC/Q is low. If
C/QI is low, OUTC/Q is high.
High-side
LS is always disabled. HS is ON when INC/Q is low
and ENC/Q is high, OFF in all other cases. Slow
asynchronous decay if the HS is turned off by ENC/Q
or in case of cut-off. The internal pull-down current
generator on C/QI should be disabled through control
register 1, unless C/QI is connected to C/QO through a
100 Ω (or more) resistor. The receiver is OFF when
ENC/Q is high: OUTC/Q is high. The receiver is ON
when ENC/Q is low: if C/QI is high, OUTC/Q is low. If
C/QI is low, OUTC/Q is high.
Push-pull
INC/Q low and ENC/Q high: HS ON and LS OFF.
INC/Q high and ENC/Q high: LS ON and HS OFF.
If ENC/Q is low, both HS and LS are OFF. Slow
asynchronous decay in case of cut-off or turn-off of
both switches. An internal dead time is generated
between each LS turn-off and the following HS turn-on
and between each HS turn-off and the following LS
turn-on.
The receiver is OFF when ENC/Q is high: OUTC/Q is
high.
The receiver is ON when ENC/Q is low: if C/QI is high,
OUTC/Q is low. If C/QI is low, OUTC/Q is high.
Tri-state
HS and LS are OFF regardless of the state of ENC/Q
and INC/Q. The receiver is OFF when ENC/Q is high:
OUTC/Qis high.
The receiver is ON when ENC/Q is low: if C/QI is high,
OUTC/Q is low. If C/QI is low, OUTC/Q is high.
0
0
0
1
1
1
28/60
0
1
1
0
0
1
1
0
1
0
1
0
Low-side ON
LS is ON regardless of the state of ENC/Q and INC/Q.
Slow asynchronous decay in case of cut-off.
The receiver is OFF when ENC/Q is high: OUTC/Q is
high.
The receiver is ON when ENC/Q is low: if C/QI is high,
OUTC/Q is low. If C/QI is low, OUTC/Q is high.
High-side ON
HS is ON regardless of the state of ENC/Q and INC/Q.
Slow asynchronous decay in case of cut-off.
The receiver is OFF when ENC/Q is high: OUTC/Q is
high.
The receiver is ON when ENC/Q is low: if C/QI is high,
OUTC/Q is low. If C/QI is slow, OUTC/Q is high.
DocID022817 Rev 5
L6360
Device configuration
C/Q[2]
1
C/Q[1]
C/Q[0]
1
1
Configuration
Notes
Push-pull
inductive load
INC/Q low and ENC/Q high: HS ON and LS OFF. INC/Q
high and ENC/Q high: LS ON and HS OFF. If ENC/Q is
low, both HS and LS are OFF.
Slow asynchronous decay in case of cut-off or turn-off
of both switches. An internal dead time is generated
between each LS turn-off and the following HS turn-on
and between each HS turn-off and the following LS
turn-on.
The receiver is OFF when ENC/Q is high: OUTC/Q is
high.
The receiver is ON when ENC/Q is low: if C/QI is high,
OUTC/Q is low. If C/QI is low, OUTC/Q is high.
See also the Section 6.12: "Demagnetization".
In order to reduce the risk of damage to the output stage (e.g. switching from push-pull
inductive load to any transceiver configuration while an inductive load has some residual
energy), the user must not switch between any of two “active” (low-side, high-side, pushpull, low-side ON, high-side ON, push-pull inductive load) configurations of the bridge. For
example, if the microcontroller needs to switch from push-pull to high-side configuration, it
needs to modify the configuration register twice:
First-step: switch from push-pull to OFF (or tri-state)
Second-step: switch from OFF (or tri-state) to high-side
If the microcontroller asks for a forbidden jump between configurations, the IC remains in
the previous configuration and reports a parity error to the microcontroller. In case of
sequential write, no parity error is generated if the microcontroller rewrites the configuration
register with the previous value; if the operation, instead, requires a forbidden jump, all data
are rejected also for other registers (and a parity error is raised).
The L+ switch is a high-side switch. HS is ON when ENL+ is high, otherwise it is OFF. Fast
decay with active clamp (-Vdemag) is operated when the HS is turned off or in the case of
cut-off.
Receiver I/Q is always ON.
Bit 4:2 = not used
Bit 1:0 = not used
LED registers
See Section 9: "Diagnostic LED sequence generator and driver".
These registers are used to configure the two LED drivers integrated in the IC. Each LED
driver has two associated registers and turns on or off the external LED according to the
information stored in the registers, which are scanned with a rate of 63 ms per bit. LED
drivers can be used for status or diagnostic information, or for other purposes, and should
be configured by the host microcontroller.
LED1 registers
Reset value: [00000000]
DocID022817 Rev 5
29/60
Device configuration
L6360
Figure 16: LED1 registers
LED2 registers
Reset value: [00000000]
Figure 17: LED2 registers
Parity register
Read only
Reset value: [00000000]
Figure 18: Parity register
This register stores the parity of each register, calculated after the L6360 receives data
registers.
Bit 7 = SR: status register parity
This bit is the parity of the status register.
Bit 6 = CR: configuration register parity
This bit is the parity of the configuration register.
Bit 5 = CT1: control register 1 parity
This bit is the parity of control register 1.
Bit 4 = CT2: control register 2 parity
This bit is the parity of control register 2.
Bit 3 = L1H: LED1 high register parity
30/60
DocID022817 Rev 5
L6360
Device configuration
This bit is the parity of the LED1 MSB register (15 down to 8).
Bit 2 = L1L: LED1 low register parity
This bit is the parity of the LED1.
LSB register (7 down to 0).
Bit 1 = L2H: LED2 high register parity
This bit is the parity of the LED2 MSB register (15 down to 8).
Bit 0 = L2L: LED2 low register parity
This bit is the parity of the LED2 LSB register (7 down to 0).
6.10
Start-up default configuration
Table 25: "Register default configuration" shows the device register default configuration.
Table 24: Parameter default configuration
Parameter
Default value
Icoq
220 mA
tdcoq
100 µs
trcoq
25 ms
tdbq
5 µs
tdcol
500 µs
trcol
64 ms
tbdq
5 µs
Output stage
Tri-state
Table 25: Register default configuration
Registers
Bit position
Bit name
Reset value
Bit 7
PO
0
Bit 6
Not used
x
Bit 5
OVT
0
Bit 4
CQOL
0
Bit 3
IQOL
0
Bit 2
Not used
x
Bit 1
REGLN
0
Bit 0
PE
0
Bit 7
C/Q2
1
Bit 6
C/Q1
0
Bit 5
C/Q0
0
Bit 4
Not used
x
Bit 3
Not used
x
Bit 2
Not used
x
Status register
Configuration register
DocID022817 Rev 5
31/60
Device configuration
L6360
Registers
Bit position
Bit name
Reset value
Bit 1
Not used
x
Bit 0
Not used
x
Bit 7
ENCGQ
0
Bit 6
Icoq1
0
Bit 5
Icoq0
1
Bit 4
tdcoq1
0
Bit 3
tdcoq0
0
Bit 2
trcoq
0
Bit 1
tdbq1
0
Bit 0
tdbq0
1
Bit 7
ENCGI
0
Bit 6
Not used
x
Bit 5
CQPDG
1
Bit 4
L+COD
0
Bit 3
tdcoi0
0
Bit 2
trcoi
0
Bit 1
tdbi1
0
Bit 0
tdbi0
1
Bit 7
L1R15
0
Bit 6
L1R14
0
Bit 5
L1R13
0
Bit 4
L1R12
0
Bit 3
L1R11
0
Bit 2
L1R10
0
Bit 1
L1R9
0
Bit 0
L1R8
0
Bit 7
L1R7
0
Bit 6
L1R6
0
Bit 5
L1R5
0
Bit 4
L1R4
0
Bit 3
L1R3
0
Bit 2
L1R2
0
Bit 1
L1R1
0
Bit 0
L1R0
0
Bit 7
L2R15
0
Bit 6
L2R14
0
Bit 5
L2R13
0
Control register 1
Control register 2
LED1 register MSB
LED1 register LSB
LED2 register MSB
32/60
DocID022817 Rev 5
L6360
Device configuration
Registers
Bit position
Bit name
Reset value
Bit 4
L2R12
0
Bit 3
L2R11
0
Bit 2
L2R10
0
Bit 1
L2R9
0
Bit 0
L2R8
0
Bit 7
L2R7
0
Bit 6
L2R6
0
Bit 5
L2R5
0
Bit 4
L2R4
0
Bit 3
L2R3
0
Bit 2
L2R2
0
Bit 1
L2R1
0
Bit 0
L2R0
0
Bit 7
SR
0
Bit 6
CR
0
Bit 5
CT1
0
Bit 4
CT2
0
Bit 3
L1H
0
Bit 2
L1L
0
Bit 1
L2H
0
Bit 0
L2L
0
LED2 register LSB
Parity register
6.11
Interrupt
The IRQ pin (interrupt pin) should normally be held to a high logic level by an external pullup resistor or microcontroller pin configuration. The internal structure is an open drain
transistor. It should be connected directly to the microcontroller so, in the case of a fault
event (C/Q overload, power-on L+ line, overtemperature condition, etc.), it is pulled down to
a low logic level, reporting the fault condition to the microcontroller.
6.12
Demagnetization
The power stage can be represented as shown in the following figure.
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Device configuration
L6360
Figure 19: Power stage, Q2 is not present on L+ output
When a power stage output (C/Q or L+) is connected to an inductance, the energy stored
in the load is:
Equation 1:
E= 1/2 LI2
This energy must be properly dissipated at the switch-off. Without an appropriate circuitry
the output voltage would be pulled to very negative values, therefore recovering the stored
energy through the breakdown of the power transistor. To avoid this, the output voltage
must be clamped so that the voltage across the power switch does not exceed its
breakdown voltage. In the case of load connected between the C/Q O pin and VCC, at
switch-off (of the low-side switch) the output is pushed to a voltage higher than VCC.
6.12.1
Fast demagnetization
It applies to L+ channel only.
Figure 20: Fast demagnetization principle schematic. Load connected to L-
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L6360
Device configuration
When a high-side driver turns off an inductance, a reversed polarity voltage appears across
the load. The output pin (L+) of the power switch becomes more negative than the ground
until it reaches the demagnetization voltage, Vdemag. The conduction state of the power
switch Q1 is linearly modulated by an internal circuitry in order to keep the voltage at C/Q
or I/Q pin at about Vdemag until the energy in the load has been dissipated. The energy is
dissipated in both IC internal switch and load resistance.
Figure 21: Fast demagnetization waveform. Load connected to L-
6.12.2
Slow demagnetization
It applies to C/Q channel.
Figure 22: Slow demagnetization block. Load connected to L-
When a high-side driver turns off an inductance a reversed polarity voltage appears across
the load. In slow demagnetization configuration the low-side switch Q2 is ON and the C/Q
pin is pulled to a voltage slightly (depending on Q2 drop) below the ground (L-). The energy
is dissipated in both the IC internal switch and the load resistance. In the case of load
connected between the C/Q pin and VCC, at switch-off (of the low-side switch Q2), the
switch Q1 is ON and the output is pushed to a voltage slightly higher than V CC.
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Device configuration
L6360
Figure 23: Slow demagnetization waveform. Load connected to GND
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DocID022817 Rev 5
L6360
I2C protocol
7
I2C protocol
7.1
Protocol configuration
Figure 24: Device initialization
Microcontroller initialization: microcontroller initialization phase.
Write mode: the L6360 is configured by the microcontroller through I 2C. To configure the
device, it is necessary to write its internal registers.
Parity check: the L6360 calculates the parity of each received register and stores it in the
parity register. After which, it compares it with the parity transmitted together with the data.
If the parity check of one or more registers failed, the “parity error bit” in the status register
is set and an interrupt is generated by the L6360. The microcontroller can now read the
status register and the parity register (current read). So the microcontroller can understand
the interrupt cause and which register fails the transmission. If the parity check is ok, the
flow goes on (read mode).
Write register failed: the microcontroller can again write the register(s) that failed the
check.
Read mode: read status register to monitor if the configuration is good (read mode).
7.2
Operating modes
Writing modes
The L6360 is configured by the microcontroller through I2C. To configure the device, it is
necessary to write its internal registers. There are two writing modes:


Current: single register
Sequential: all registers in sequence
Current write mode
The microcontroller I2C is configured as master transmitter. The L6360 I2C is configured as
the slave receiver.
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I2C protocol
L6360
Figure 25: Current write mode flow chart procedure
Microcontroller I2C establishes the communication: START condition.
Microcontroller I2C sends the slave address on the I2C bus to check if the slave is
online (1st frame).
3. After the address is matched, the microcontroller starts the data transmission: the 2 nd
frame is the data to be written into the selected register.
4. The 3rd frame is composed of the address of the register to be written and of the parity
of the 2nd frame.
5. Microcontroller I2C finishes the communication: STOP condition.
6. The L6360 calculates the parity of the data received.
7. The L6360 compares its parity calculation with the parity bits in the 3 rd frame (sent by
the microcontroller).
8. If the parities match, the protocol flow goes on (exit), otherwise the PE bit inside the
L6360 status register is set and the flow goes to the next state.
9. The L6360 generates an interrupt to report the parity check error.
10. The microcontroller sends a read request to the device. The L6360 then sends the
status and parity registers. The microcontroller can resend the corrupted data register.
11. Back to step 1.
1.
2.
The I2C frame (configuration, control, diagnostic phases) must provide:





Slave address (7 bits)
Transmission direction (read/write)
Data (8 bits: data register)
Parity bits (P2, P1, P0)
Register address (4 bits: 16 registers addressable)
The three frames are shown in the following figure:
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L6360
I2C protocol
Figure 26: Current write mode frames
1st frame
Bit 7 to 1: the L6360 address
Bit 0: direction
Table 26: Current write mode direction bit
W bit
Master
Slave
0
Write mode
Read mode
1
Read mode
Write mode
2nd frame
Bit 7 to 0: data register
3rd frame
Bit 7 to 5: parity bits
Bit 4: unused
Bit 3 to 0: register address
The parity check bits are calculated as shown in equation 2
Equation 2:
P0 = D7 ⊕D6 ⊕ D5 ⊕D4 ⊕D3 ⊕D2 ⊕ D1 ⊕D0
P1 = D7 ⊕D5 ⊕ D3 ⊕D1 (odd parity)
P2 = D6 ⊕D4 ⊕ D2 ⊕D0 (even parity)
Where ⊕means "XOR".
If parity error occurs, the register is not overwritten.
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I2C protocol
Sequential write mode
L6360
Figure 27: Sequential write mode flow chart procedure
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
The microcontroller I2C establishes the communication: START condition.
The microcontroller I2C sends the slave address on the I2C bus to check if the slave is
online (1st frame).
After the address is matched, the microcontroller starts the sequential transmission
(2nd to 8th frame).
The microcontroller sends its parity register (last frame: 9 th frame).
Microcontroller I2C finishes the communication: STOP condition.
The L6360 calculates the parity of the registers received, and stores the results in the
parity register.
The L6360 compares its parity register with the parity register sent by the
microcontroller (9th frame).
If the parities match, the protocol flow goes on (EXIT), otherwise the PE bit inside the
L6360 status register is set, and the flow goes to the next state.
The L6360 generates an interrupt to report the parity check error.
The microcontroller sends a read request to the device. In this phase the L6360 sends
the status register and the parity register allowing the microcontroller to verify which
register failed the configuration.
Now the microcontroller can perform a new write sequential procedure.
Microcontroller I2C establishes the communication: START condition.
Microcontroller I2C sends the slave address on the I2C bus to check if the slave is
online.
The microcontroller resends the data registers.
Back to step 5.
The I2C frame (configuration, control, diagnostic phases) must provide:



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Slave address (7 bits)
Transmission direction (read/write)
Data (8 bits: data registers)
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L6360
I2C protocol
The 9 frames are shown below:
Figure 28: Sequential write mode frames
1st frame
Bit 7 to 1: the L6360 address
Bit 0: direction (write/read)
Table 27: Sequential write mode direction bit
W bit
Master
Slave
0
Write mode
Read mode
1
Read mode
Write mode
2nd to 8th frame
Bit 7 to 0: data register
9th frame
Bit 7 to 0: microcontroller parity register
The microcontroller parity check (for each register) calculus performed is shown below:
Figure 29: Microcontroller parity check calculus
Bit 6 = P6: microcontroller configuration register parity
This bit is the parity of the configuration register.
Bit 5 = P5: microcontroller control register 1 parity
This bit is the parity of control register 1.
Bit 4 = P4: microcontroller control register 2 parity
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I2C protocol
This bit is the parity of control register 2.
L6360
Bit 3 = P3: microcontroller LED1 register high parity
This bit is the parity of the LED1 MSB register (15 down to 8).
Bit 2 = P2: microcontroller LED1 register low parity
This bit is the parity of the LED1 LSB register (7 down to 0).
Bit 1 = P1: microcontroller LED2 register high parity
This bit is the parity of the LED2 MSB register high (15 down to 8).
Bit 0 = P0: microcontroller LED2 register low parity
This bit is the parity of the LED2 LSB register high (7 down to 0).
For each register, a parity check is calculated as shown in equation 3
Equation 3:
PX = D7 ⊕ D6 ⊕D5 ⊕D4 ⊕D3 ⊕D2 ⊕ D1⊕ D0 (X = 0 to 6)
D7 to D0 indicates bits inside each register.
Where ⊕means "XOR".
If parity error occurs, the registers are not overwritten.
In this writing mode, all writable registers and the microcontroller parity register are sent.
Figure 30: Register sequence in sequential write mode
Read mode
The status register and parity check register are read only. The other registers are
readable/writable (by microcontroller). There are three reading modes:



Current: status register only
Sequential: all registers in sequence
Random: to read registers in sequence starting from a register address fixed by the
microcontroller
All registers are addressed as shown in the table below:
Table 28: Read mode: register address
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Address
Register name
0000
Status register
0001
Configuration register
0010
Control register 1
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L6360
I2C protocol
Address
Register name
0011
Control register 2
0100
LED1 register MSB
0101
LED1 register LSB
0110
LED2 register MSB
0111
LED2 register LSB
1000
Parity register
Current read mode
Figure 31: Current read mode flow chart procedure
1.
2.
3.
4.
5.
Microcontroller I2C establishes the communication: START condition
Microcontroller I2C sends slave address on the I2C bus to check if the slave is online
(1st frame)
After the address is matched, the L6360 sends its status register (2 nd frame)
The L6360 sends its parity register (3rd frame)
Microcontroller I2C finishes the communication: STOP condition
The I2C frame (configuration, control, diagnostic phases) must provide:



Slave address (7 bits)
Transmission direction (read/write)
Data (8-bit data registers): status and parity registers
The three frames are shown in the following figure:
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I2C protocol
L6360
Figure 32: Current read mode frames
When a “read request” comes from the microcontroller (it is configured as master receiver),
the IC (slave transmitter) sends the contents of the status and parity registers.
Figure 33: Current read communication flow
Sequential/random read modes
Figure 34: Sequential/random read mode
1.
2.
3.
4.
5.
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Random/sequential read mode initialization: microcontroller I2C establishes the
communication: START condition.
Microcontroller I2C sends the slave address, in write mode, on the I2C bus to check if
the slave is online (1st frame).
Microcontroller I2C sends the register address start point, which sets the first register
to read in sequence (2nd frame).
Microcontroller I2C finishes the communication: STOP condition.
Microcontroller I2C sends the slave address, in read mode, on the I 2C bus to check if
the slave is online (3rd frame).
DocID022817 Rev 5
L6360
6.
7.
I2C protocol
After the address is matched, the L6360 sends its registers in sequential mode,
starting from the register set in the 2nd frame.
The microcontroller I2C finishes the communication: STOP condition.
The I2C frame (configuration, control, diagnostic phases) must provide



Slave address (7 bits)
Transmission direction (read/write)
Data (8-bit data register)
The frame structure is shown in the figure below
Figure 35: Sequential/random read communication flow
1st frame
Bit 7 to 1: the L6360 address
Bit 0: direction (write)
Bit 7 to 1: address register starting point
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I2C protocol
L6360
Table 29: Address register
Address
Register name
0000
Status register
0001
Configuration register
0010
Control register 1
0011
Control register 2
0100
LED1 register MSB
0101
LED1 register LSB
0110
LED2 register MSB
0111
LED2 register LSB
1000
Parity register
3rd frame
Bit 7 to 1: L6360 address
Bit 0: direction (read)
4th to nth frame
Bit 7 to 0: data register (from address register starting point to penultimate address
register)
9th frame
Bit 7 to 0: parity register (the last register)
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8
Physical layer communication
Physical layer communication
The IC transfers the data received (on the INC/Q digital input pin) to the C/QO output. The
ENC/Q pin allows the C/QO line to be put into tri-state. Data received from the line (C/QI and
I/Q pins) are transferred to the digital output pins OUT C/Q and OUTI/Q.
Figure 36: Block diagram communication mode
Figure 37: System communication mode
8.1
Transceiver
Output drivers (C/QO and L+) are protected against short-circuit or overcurrent by means of
two different functions. One is the current limiting function: output current is linearly limited
to ILIMQ/L. The cut-off protection, on the other side, turns off the drivers when the output
current exceeds a (programmable for the C/QO driver) threshold (ICOL/I). When the current
reaches the (programmed) cut-off value the channel output driver is turned off after a
programmable delay (tdcoq/l). The channel output driver automatically restarts again after a
programmable delay time (trcoq/l).
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Physical layer communication
L6360
Figure 38: C/Q or L+ channel cut-off protection
Figure 39: C/Q or L+ channel current limitation and cut-off protection with latched restart
8.2
IEC 61131-2 type 1 digital inputs
Two IEC61131-2 type 1 inputs are provided: one is available on C/QI (as per IO-Link
specification to support SIO mode) and one on I/Q pin. Both are provided with a
programmable debounce filter (tdbq and tdbi, see Table 17: "ENCGI: I/Q pull-down enable"
and Table 23: "C/Q output stage configuration") to prevent false triggering.
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9
Diagnostic LED sequence generator and driver
Diagnostic LED sequence generator and driver
Each LED indication block can drive, through an open drain output, one external LED. LED
drivers can be used for status or diagnostic information, or for other purposes, and should
be configured by the host microcontroller. Two sequences of 16 bits can be programmed
(through I2C) to generate user specific sequences; each LED driver has two associated
registers and turns the external LED on or off according to the information stored in the
registers, which are scanned at a rate of 63 ms per bit; total sequence time of each LED is
approximately 1 s. Figure below shows how to wire up the two LEDs.
Figure 40: LED drivers
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Line regulator
10
L6360
Line regulator
The L6360 embeds a linear regulator with output voltage selectable (by the SEL pin) at 3.3
V or 5 V.
The input voltage is VH and the maximum power dissipation is 200 mW. The linear
regulator minimum limitation current value is ILIMLR.
Figure 41: Linear regulator
Table 30: Linear regulator selection pin
SEL
VDD
0
5 V ± 2.5%
1
3.3 V ± 2%
The linear regulator cannot be turned off as it is necessary to supply (through VDD pin)
internal circuitries. It can also be used to supply external circuitry (e.g. the microcontroller).
Figure 42: Linear regulator principle schematic
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L6360
11
Application example
Application example
The IO-Link master system typically consists of a microcontroller and physical layer and it
communicates with an IO-Link device. The principle connection can be seen in the figure
below.
Figure 43: Application example
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EMC protection considerations
12
L6360
EMC protection considerations
Depending on the final product use and environmental conditions, the master application
may require additional protection.
12.1
Supply voltage protection
In order to avoid the overvoltage on a system supply, a voltage suppressor such as
Transil™ can be added. A protection diagram example is shown in the figure below.
Figure 44: Supply voltage protection with uni-directional Transil
Performance of the above mentioned example is limited and does not include reverse
polarity protection. It is just a cost-effective solution.
Table 31: Supply voltage protection component description
Part
Function
Description
D_S
Supply
overvoltage
protection
It works as a primary overvoltage clamp to limit supply line distortions,
such as: surge pulses, oscillations caused by line parasitic
parameters (inductance) during plug-in phase, etc. 1500 W is
recommended to provide reliable protection, unidirectional type helps
to avoid negative stress of the L6360.
C_F
Filtering bulk
capacitor
An energy buffer for application supply filters the application supply to
avoid high ripple during power driver switching.
A more sophisticated solution can be seen in the figure below.
Figure 45: Refined supply voltage protection
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L6360
EMC protection considerations
Table 32: Refined supply voltage protection component description
Part
Function
Description
Primary
overvoltage
protection
It works as a primary overvoltage clamp to limit supply line distortions,
such as: surge pulses, oscillations caused by line parasitic
parameters (inductance) during plug-in phase. 1500 W is
recommended to provide reliable protection, unidirectional type is
chosen to cover reverse polarity protection.
D_POL
Reverse polarity
protection
It avoids reverse direction current flow and negative voltage stress of
the L6360. Its current rating (3 A) is chosen in accordance with the
maximum driving capabilities of the L6360 power stages. Schottky
type is recommended to limit power dissipation (low VF). Voltage
rating (100 V) comes from negative surge to the supply condition.
D_S
D_PWR support
and IO
overvoltage
protection
a) It shares a positive surge current with the primary protection and
limits the overvoltage amplitude. b) It clamps surges applied to the
L6360 C/Q and L+ lines.
C_F
Filtering bulk
capacitor
An energy buffer for application supply filters the application supply to
avoid high ripple during power driver switching etc.
D_PWR
If the VH pin of the L6360 is supplied by a separate power supply or if it is decoupled by the
main power supply and blocked by bulk capacitors, an additional circuit may be required to
ensure the VH voltage is always lower than (or equal to) the main supply voltage (VCC). A
possible solution with diode is shown in the figure below.
Figure 46: VH protection vs. VCC
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EMC protection considerations
L6360
Table 33: VH protection component description
12.2
Part
Function
Description
D_VH
VH
overvoltage
protection
VH voltage must be always lower than (or equal to) VCC. Even during the
powering-up and down of an application. This fact must be taken into
consideration if VH is supplied by another source (VCC and VH not
connected together), charged capacitors. In some cases a diode placed
between VCC and VH may help to avoid this violation.
I/O line protection
The figure below shows external components (capacitors) suitable for IO-Link
communication, protection level in accordance with the specification.
Figure 47: Typical protection in IO-Link applications
Table 34: Typical protection in IO-Link application component description
Part
C_1
C_I/Q, C_C/Q, C_L+
Function
Description
Power supply
blocking
Energy buffer for the L6360 supply, makes chip
supply voltage stable, limits EMI noise.
Filtration capacitors
Work as a basic protection against fast transient
signals like burst or radio-frequency domain applied
to the lines. Limit voltage spike frequency spectrum
and amplitude.
If an extended protection level is required, the solution seen in the next figure is
recommended. It provides robust protection according to IEC61131-2. It is suitable for IOLink communication and is backward compatible with SIO (standard I/O). It protects the
L6360 application against high energy surge pulses according to the IEC61000-4-5
standard. All the lines are protected against ±2.5 kV surge pulse amplitude in common
mode and ±1 kV in differential mode considering 42 Ω/0.5 μF generator coupling.
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L6360
EMC protection considerations
Figure 48: IO-Link and SIO application extended protection
Table 35: IO-Link and SIO application extended protection component description
Part
Function
Description
C_I/Q, C_C/Q, C_L+
Filtration
capacitors
Work as a basic protection against fast transient signals like
burst or radio-frequency domain applied to the lines. Limit
voltage spike frequency spectrum and amplitude.
D_I/Q, D_C/Q
Negative
voltage spike
suppression
Schottky diodes with low VF clamp the disturbance applied
to the lines in a reverse polarity direction. Capable of
conducting high surge current pulses to avoid high peak
current flow through the L6360 pins
R_I/Q
Surge
current
limitation
Reduces the current flow in the L6360 - I/Q pin in both
polarities when e.g. surge noise is applied to the line. If this
resistor is omitted, I/Q line surge immunity is lower.
Overvoltage
protection
Primary surge protection to avoid overvoltage on the L6360
interface. Protects L+ switch against negative voltage
pulses. Shares current flow of negative surge pulses with the
additional Schottky diodes on C/Q and I/Q lines. Clamps
positive surge pulse amplitude applied to I/Q line.
U2 (SPT01-335DEE)
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Ordering information
13
L6360
Ordering information
Table 36: Ordering information
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Order code
Package
Packing
L6360TR
VFQFPN 26L (3.5x5x1 mm)
Tape and reel
DocID022817 Rev 5
L6360
14
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
14.1
VFQFPN 26L (3.5x5x1 mm) package information
Figure 49: VFQFPN 26L (3.5x5x1.0 mm) package outline
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Package information
L6360
Table 37: VFQFPN 26L (3.5x5x1.0 mm) package mechanical data
mm
Dim.
Min.
Typ.
Max.
A
0.80
0.90
1.00
A1
0.00
0.02
0.05
A3
0.20
b
0.18
D
0.25
0.30
3.50 BSC
D2
1.90
E
2.00
2.10
5.00
E2
3.40
e
3.50
3.60
0.50
L
0.30
ddd
0.40
0.50
0.05
VFQFPN stands for thermally enhanced very thin fine pitch quad flat package no
lead. Very thin profile: 0.80 < A ≤ 1.00 mm. Details of terminal 1 are optional but
must be located on the top surface of the package by using either a mold or
marked features.
14.2
Packing information
Figure 50: VFQFPN 26L (3.5x5x1.0 mm) carrier tape outline
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15
Revision history
Revision history
Table 38: Document revision history
Date
Revision
Changes
12-Mar-2012
1
Initial release.
15-Mar-2012
2
Updated Eload definition in table 3: Absolute maximum ratings.
Updated figure 36: Block diagram communication mode.
25-Jan-2013
3
Updated table 4: Recommended operating conditions
11-Mar-2016
4
Added figure titled "VFQFPN 26L (3.5x5x1.0 mm) carrier tape
outline.
09-May-2016
5
Updated Table 5: "Supply" and Table 24: "Parameter default
configuration".
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L6360
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