IS32LT3178-STLA3-EB: Automotive Linear Constant Current Led Driver, 150mA @ 40V


The IS32LT3178-STLA3-EB is a adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10mA to 150mA (the SOP-8-EP package can deliver up to 200mA). The devices can operate from an input voltage from 2.9V to 40V with a minimal voltage headroom of 1.0V (Typ.) at 150mA. Designed with a low dropout voltage; the device can drive LED strings close to the supply voltage without switch capacitors or inductors.

The IS32LT3178 simplifies designs by providing a stable current without the additional requirement of inductors, FETs or diodes. The complete constant current driver requires only a current set resistor and a small PCB area making designs both efficient and cost effective. The EN Pin of the IS32LT3178 can function as the PWM signal input used for MCU PWM dimming. As a current sink it is ideal for LED lighting applications or current limiter for power supplies.


Manufacturer Lumissil Microsystems
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Part Number 2521-IS32LT3178-STLA3-EB-ND
Eval Board Supplier Lumissil Microsystems
Eval Board Normally In Stock
Voltage In 2.6 ~ 40 V
Topology Linear
Current Out 150 mA
Voltage Out (Max) 40 V
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions - Not Given
Features Current Limit (Adj. or Fixed)
PWM Interface
Shutdown, Enable, Standby
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency - Not Given
Component Count + Extras 5 + 9
Design Author Lumissil Microsystems
Application / Target Market Automotive: Exterior Lighting
Automotive: Interior Lighting
Lighting: LED Commercial Lighting
Lighting: LED Home Lighting
Main I.C. Base Part IS32LT3178
Date Created By Author 2018-10
Date Added To Library 2021-08

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