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What is IS32LT3180?

This electronic component, produced by the manufacturer "ISSI", performs the same function as "LINEAR CURRENT DRIVER".


IS32LT3180 Datasheet PDF - ISSI

Part Number IS32LT3180
Description LINEAR CURRENT DRIVER
Manufacturers ISSI 
Logo ISSI Logo 


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IS32LT3180
DUAL INTENSITY, LINEAR CURRENT DRIVER FOR RCL
Preliminary Information
December 2014
GENERAL DESCRIPTION
The IS32LT3180 is an eight channel linear current
regulator for automotive rear tail light applications such
as RCL (Rear Combination Lamps) and CHMSL
(Center High Mounted Stop Lamps). It is fully
programmable with two LED brightness levels for the
different intensity requirements of “stop” bright (DC
mode) and “tail” dim (PWM mode).
A logic level at the PWM pin is used to select between
the tail and stop output conditions. The stop condition
provides the highest intensity output, while the tail
condition utilizes an internally generated PWM signal
to reduce the intensity of the LEDs’ light output.
The sink current at the OUTx pins is easily set with a
single resistor at the STOP pin. A second resistor at
the TAIL pin sets the duty cycle of the internal PWM
oscillator for dimming (less bright) the LED output
when operating in the tail condition.
An external FET (optional) can be implemented for
operation with wide varying supply voltages.
The IS32LT3180 is offered in an eTSSOP-16 package.
FEATURES
Output current programmable from 10mA to
75mA
Tail duty cycle programmable from 1% to 95%
Linear voltage regulator to optimize consumption
on device
Low dropout voltage of 0.8V@35mA
Slew rate control on each output for better EMI
performance
PWM logic level input selects between full
brightness and PWM dimming levels
FAULT reporting
LED open/short circuit detection
Input overvoltage protection
STOP pin overcurrent protection
Thermal rollback of output current
Withstand 50V load dump
AEC-Q100 qualification (pending)
APPLICATIONS
Rear Combinational Lamp (RCL)
Center High Mount Stop Light (CHMSL)
Daytime running lamp
Fog lamps
Turn signal
TYPICAL APPLICATION CIRCUIT
TAIL
STOP
10k
10nF
1k
Q1
RGS 50
1k
220nF
CVCC
1F
R RSTOP
TAIL
3.09k 7.72k
0.1 F
3
ERC
2
VCC
6
FAULT
1
OUT1
5 IS32LT3180
PWM
9
7 OUT8
STOP
84
TAIL
FB
13
GND
VSTRING
RFB1
8.87k
RFB2
1k
Figure 1 Typical Application Circuit
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0A, 12/09/2014
1

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IS32LT3180 equivalent
IS32LT3180
ABSOLUTE MAXIMUM RATINGS
VCC, ERC, PWM, FAULT, OUTx, FB
TAIL, STOP
OUTx current
Operating junction temperature, TJ
Storage temperature range, TSTG
Operating ambient temperature range, TJ = TA
Package thermal resistance (Junction to ambient), RθJA
Power dissipation, PD(MAX) (Note 2)
ESD (HBM)
ESD (CDM)
-0.3 to 50V
-0.3 to 5.5V
100mA
150°C
-55°C ~ +150°C
-40°C ~ +150°C
39.9W/°C
2.5W
2kV
750V
Note 1:
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only
and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 2:
Detail information please refers to package thermal de-rating curve on Page 13.
ELECTRICAL CHARACTERISTICS
TJ = -40°C ~+150°C, VCC = 6V~16V, RSTOP =3.09k, RTAIL =7.72k. (Note 3)
Symbol
Parameter
Condition
ICC Input current
IOUT_MAX Maximum sink current
IOUTACC Sink current accuracy
IOUTx =35mA, VCC =16V, 8 channels
TJ = -40°C ~+125°C
TJ = +150°C (Note 5)
TJ = -40°C ~+125°C, VOUTx =1.2V
TJ = +150°C (Note 5)
IOUTx =35mA = (IOUT_MAX+IOUT_MIN)/2
VOUTx = 0.8V, TJ = -40°C ~+125°C
(Note 4, 6)
IOUT
IL
LR
VOVP
IOSB
IFSB
Current matching
1-2×IOUT/(IOUT_MAX+IOUT_MIN)
IOUTx =35mA, TJ = -40°C ~+125°C
TJ = +150°C (Note 5)
Current leakage
VOUTx =42V
Line regulation
6V< VCC <16V, 0.8V<VOUTx<3V
IOUTx = 35mA, 8 channels
TJ = -40°C ~+125°C (Note 6)
Overvoltage setback threshold @99%IOUTx
Overvoltage setback current VCC =20V
FAULT reporting of setback
current
VOC
VTH
VSCR
Open LED detection threshold
Output disable threshold
Short LED detection threshold
for reduced LED Current
RCS Current slew rate
IOUTx = 35mA, 10%~90%
TJ = -40°C ~+125°C
TJ = +150°C (Note 5)
Min. Typ. Max. Unit
6.0 8.0
mA
6.0
75
25
mA
-8 0 8 %
-5 0
5
%
±7
1 µA
0.6 3 mA
16 18.7 23
V
95 %IOUT
80 %IOUT
0.3 0.4 0.5
V
100 250 mV
3.2 3.6
4
V
5 20
mA/µs
10
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0A, 12/09/2014
5


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