IS32LT3174
DESCRIPTION
The IS32LT3174 is a linear programmable current regulator consisting of one output channel capable of up to 200m A. It features an ON/OFF input pin to toggle the channel between the OFF condition and the source condition.
A single external resistor programs the current level for the channel, while a separate, single resistor programs the fade in and fade out rate for channel.
The device integrates a 63 steps fade in and fade out algorithm (Gamma correction) which causes the output LED current to gradually ramp up to the full source value after the channel’s control pin is pulsed. The same controller causes the LED current to gradually ramp down to zero if the channel’s input control pin is pulsed while the output channel is on. The LED current output can be controlled by a momentary contact switch or logic level signal.
The IS32LT3174 is targeted at the automotive market with end applications to include map and dome lighting as well as exterior accent lighting. For 12V...
