CHERRY CS3341YD14

CS3341/3351/386/387
CS3341/51
CS386/387
Alternator Voltage Regulator
Darlington Driver
Features
Description
The CS3341/3351/386/387 integral
alternator regulator integrated circuit provides the voltage regulation
for automotive, 3-phase alternators.
provided to drive an external darlington transistor capable of switching on a fault indicator lamp. An
overvoltage or no STATOR signal
condition activates the lamp output.
It drives an external power
Darlington for control of the alternator field current. In the event of a
charge fault, a lamp output pin is
The CS3341 and CS3351 are available in SO14 packages. The CS386
and CS387 are available as Flip Chips.
■ Drives NPN Darlington
■ Short Circuit Protection
■ 80V Load Dump
■ Temperature Compensated
Regulation Voltage
■ Shorted Field Protection
Duty Cycle, Self Clearing
Absolute Maximum Ratings
Storage Temperature Range .....................................................-55°C to +165°C
Junction Temperature Range ....................................................-40°C to +150°C
Continuous Supply..........................................................................................27V
ICC Load Dump .........................................................................................400 mA
Lead Temperature Soldering
Reflow (SMD styles only)............60 sec. max above 183°C, 230°C peak
Package Options
CS3341/51
14 Lead SO
DD
Block Diagram
VCC
Load Dump
Detection and
Protection
ENABLE
Series
Regulator
IGN
OSC
VSUP
–
+
–
R
Lamp
Indicator
RS Flop
Set
Dominate
Q
VREG
NC
NC
VCC
Sense
Lamp
OSC
Sense
Gnd
OSC
VSUP
+
SC
1
NC
IGN
CS386/387
S
Device
Driver
R
+
–
NC
STATOR
NC
Flip Chip
DELAY
VHV
ENABLE
STATOR
Power Up
LAMP
STATOR
Timer
SC
Note:
CS-3341/CS-387 Disconnected
CS-3351/CS-386 Connected
STATOR
VSUP
Gnd
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: [email protected]
Web Site: www.cherry-semi.com
Rev. 4/15/99
1
A
®
Company
CS3341/3351/386/387
Electrical Characteristics: CS3341/51: -40°C < TA < 125°C; -40°C < TJ < 150°C, 9V ≤ VCC ≤ 17V;
unless otherwise specified
PARAMETER
TEST CONDITIONS
■ Supply
Supply Current Enabled
Supply Current Disabled
■ Driver Stage
Device Driver
Output High Current
Output Low Voltage
Minimum ON Time
Minimum Duty Cycle
Short Circuit Duty Cycle
Field Switch Turn On
Rise Time
Fall Time
MIN
MAX
UNIT
25
50
mA
µA
–
-4
0.35
10
5
–
mA
V
µs
%
%
30
30
90
90
µs
µs
6
600
–
6
V
V
ms
V
V
–
–
–
-10
–
200
–
1
VDD = 1.2V
IOL = 25µA
TYP
12
-6
6
■ Stator
Input High Voltage
Input Low Voltage
Stator Time Out
Stator Power-Up Input High
Stator Power-Up Input Low
High to Low
CS3351/386 only
CS3351/386 only
10
–
6
10
–
■ Lamp
Output High Current
Output Low Voltage
VLAMP @ 3V
ILAMP @ 30mA
–
–
50
0.35
µA
V
■ Ignition
Input High Voltage
Input Low Voltage
ICC > 1mA
ICC < 100µA
1.8
–
–
0.5
V
V
■ Oscillator
Oscillator Frequency
Rise Time/Fall Time
Oscillator High Threshold
COSC = 0.22µF
COSC = 0.22µF
COSC = 0.22µF
65
–
325
–
6
Hz
–
V
-10
13.5
0.050
1.083
+10
16.0
0.400
1.190
µA
V
V
0.020
0.600
V
■ Battery Sense
Input Current
Regulation Voltage
Proportional Control
High Voltage
Threshold Ratio
High Voltage Hysteresis
100
17
@25°C, R1 = 100kΩ, R2 = 50kΩ
VHigh Voltage @ Lamp On
VRegulation @ 50% Duty Cycle
2
PACKAGE PIN #
PIN SYMBOL
FUNCTION
14L SO
Flip Chip
1
1
Driver
Output driver for external power switch-Darlington.
2
2
Gnd
Ground.
3, 6, 7, 9, 13
3
NC
No connection.
4
4
OSC
Timing capacitor for oscillator.
5
5
Lamp
Base driver for lamp driver indicates no stator signal or overvoltage condition.
8
6
IGN
Switched ignition power up.
10
7
Stator
Stator signal input for stator timer (CS3351 also power up).
11
8
Sense
Battery sense voltage regulator comparator input and
protection.
12
9
VCC
Supply for IC.
14
10
SC
Short circuit sensing.
Typical Performance Characteristics
CS3341/3351 Battery Voltage vs Temperature (°C)
Over Process Variation
15.5
Battery Voltage
15
14.5
14
13.5
13
−40
−20
0
20
40
60
80
100
120
Temperature (°C)
3
CS3341/3351/386/387
Package Pin Description
CS3341/3351/386/387
Application Information
The CS3341 and CS3351 IC's are designed for use in an
alternator charging system. The circuit is also available in
flip-chip form as the CS387 and CS386.
current, the magnetic field strength is controlled and hence
the output voltage of the alternator.
Referring to Figure 2, a typical application diagram, the
oscillator frequency is set by an external capacitor connected between OSC and ground. The sawtooth waveform
ramps between 1V and 3V and provides the timing for the
system. For the circuit shown the oscillator frequency is
approximately 140Hz. The alternator voltage is sensed at
Terminal A via the resistor divider network R1/R2 on the
Sense pin of the IC. The voltage at the sense pin determines
the duty cycle for the regulator. The voltage is adjusted by
potentiometer R2. A relatively low voltage on the sense
pin causes a long duty cycle that increases the Field current. A high voltage results in a short duty cycle.
In a standard alternator design (Figure 1), the rotor carries
the field winding. An alternator rotor usually has several N
and S poles. The magnetic field for the rotor is produced by
forcing current through a field or rotor winding. The Stator
windings are formed into a number of coils spaced around
a cylindrical core. The number of coils equals the number
of pairs of N and S poles on the rotor. The alternating current in the Stator windings is rectified by the diodes and
applied to the regulator. By controlling the amount of field
The ignition Terminal (I) switches power to the IC through
the VCC pin. In the CS3351/CS386, the Stator pin senses the
voltage from the stator. This will keep the device powered
while the voltage is high, and it also senses a stopped
engine condition and drives the Lamp pin high after the
stator timeout expires. The Lamp pin also goes high when
an overvoltage condition is detected on the sense pin. This
causes the darlington lamp drive transistor to switch on
and pull current through the lamp. If the system voltage
continues to increase, the field and lamp output turn off as
in an overvoltage or load dump condition.
A
Lamp
Indicator
Regulator
I
S
STATOR
Winding
IGNITION
SWITCH
FIELD
Gnd
BATTERY
The SC or Short Circuit pin monitors the field voltage. If
the drive output and the SC voltage are simultaneously
high for a predetermined period, a short circuit condition
is assumed and the output is disabled. The regulator is
forced to a minimum short circuit duty cycle.
FIELD Winding
Figure 1. IAR System Block Diagram
RECTIFIER
STATOR
S
A
R3
250Ω
R1
100kΩ
C1
0.1µF
*C2
10µF
18kΩ
R4
STATOR
VCC
SC
D1
R5 10kΩ
F
Sense
C3
.047µF
R2
Driver
50kΩ
Q1
Power Darlington
OSC
IGN
C4
0.022µF
R7
10Ω
LAMP
FIELD
Gnd
R6
20kΩ
POWER GROUND
I
Lamp
Indicator
R9
R10
510Ω
2.4kΩ
Power
Darlington
IGNITION
SWITCH
BATTERY
*Note: C2 optional for reduced jitter.
Figure 2. Typical Application Diagram
4
PACKAGE THERMAL DATA
PACKAGE DIMENSIONS IN mm (INCHES)
D
Lead Count
14L SO
Metric
Max
Min
8.75
8.55
Thermal Data
RΘJC
typ
RΘJA
typ
English
Max Min
.344
.337
14L SO
30
125
Surface Mount Narrow Body (D); 150 mil wide
4.00 (.157)
3.80 (.150)
6.20 (.244)
5.80 (.228)
0.51 (.020)
0.33 (.013)
1.27 (.050) BSC
1.75 (.069) MAX
1.57 (.062)
1.37 (.054)
1.27 (.050)
0.40 (.016)
0.25 (.010)
0.19 (.008)
D
REF: JEDEC MS-012
5
0.25 (0.10)
0.10 (.004)
˚C/W
˚C/W
CS3341/3351/386/387
Package Specification
CS3341/3351/386/387
Package Specification: continued
Flip Chip
DD
488µm
SC
506µm
510µm
VCC
506µm
605µm
Gnd
NC
OSC
1000µm
506µm
CS386/387
Flip Chip
2.07mm
Sense
594µm
Lamp
Stator
742µm
762µm
IGN
1.96mm
Solder Bump Locations, Bump Side Up
Ordering Information
Part Number
CS3341YD14
CS3341YDR14
CS3351YD14
CS3351YDR14
CS386H
CS387H
Rev. 4/15/99
Description
14L SO
14L SO (tape & reel)
14L SO
14L SO (tape & reel)
Flip Chip
Flip Chip
Cherry Semiconductor Corporation reserves the
right to make changes to the specifications without
notice. Please contact Cherry Semiconductor
Corporation for the latest available information.
6
© 1999 Cherry Semiconductor Corporation