IS31LT3380 Datasheet | Lumissil

40V/1.2A LED DRIVER WITH SWITCH DIMMING September 2011 GENERAL DESCRIPTION The IS31LT3380 is a continuous mode inductive step-down converter, designed for driving a single LED or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The chip operates from an input voltage between 8.5V and 40V and provides an output current up to 1.2A. The IS31LT3380 includes a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. The IS31LT3380 includes an integrated output switch which has a very low conducting impedance to ensure high system efficiency. The IS31LT3380 has switch dimming...