LM3642 Datasheet (Texas Instruments) - 1.5-A Synchronous Boost LED Flash Driver

LM3642, 1.5-A Synchronous Boost LED Flash Driver

The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED.

The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A.

An adaptive regulation method ensures the current source rema

LM3642 Features

* 1 1.5-A High-Side Current Source for Single LED

* > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.5 A)

* Accurate Programmable Flash LED Current from 93 mA to 1.5 A

* Accurate Programmable Torch LED Currents:

* 48.4 mA to 375 mA