IS31LT3171
DESCRIPTION
The IS31LT3170 and IS31LT3171 are adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10m A to 150m A. The devices can operate from an input voltage from 2.5V to 42V with a minimal voltage headroom of 1V (typical). Designed with a low dropout voltage; the device can drive LED strings close to the supply voltage without switch capacitors or inductors.
The IS31LT3170/71 simplifies designs by providing a stable current without the additional requirement of input or output capacitors, inductors, FETs or diodes. The plete constant current driver requires only a current set resistor and a small PCB area making designs both efficient and cost effective.
The EN pin (1) of the IS31LT3170 can be tied to Vbat or BCM PWM signal for high side dimming. The EN Pin (1) of the IS31LT3171 can function as the PWM signal input used for low side dimming.
As a current sink it is ideal for LED lighting...
