Description
The IS31LT3135 is a dual‐channel LED driver that has two modes of operation; it can function as the main‐channel driver or as a sub‐channel source. When operating in main mode, the device functions as a constant current source that outputs an adjustable current, via an external resistor, through the main LED. The device is operable with a dropout voltage of 0.1V while driving a 200mA current.

FEATUREs
● Power supply under-voltage detection
● Main-channel LED short protection
● Over-temperature protection
● Input voltage range: 2.7V to 5.5V
● Main/sub-channel adjustable output current
● (Set via user-configurable external resistors)
● Main-channel dropout VDP=0.1V
● Ultra-low quiescent current
● SOP-8 Package, small PCB footprint size

Recommended Equipment
● 5VDC Power supply
● 1W LED
● Multi‐meter

Recommended I/O Ratings
● Power supply voltage: 3.8VDC
● Output of IMAIN: 320mA per LED
● Output of ISUB: 20mA per LED