LM3646 Datasheet - Texas Instruments

LM3646 1.5-A Synchronous Boost Converter

The LM3646 utilizes a 4-MHz fixed-frequency synchronous boost converter to provide power to dual 1.5-A constant current LED sources. The high-side current sources allow for grounded cathode LED operation providing flash current up to 1.5 A total. An adaptive headroom regulation scheme ensures the LE.

LM3646 Features

* 1 High-Side Current Sources Allowing for Grounded LED Cathode for Improved Thermal Management

* > 85% Efficiency in Torch and Flash Modes

* Small Solution Size < 20 mm2

* Accurate and Programmable Flash LED Current from 24 mA to 1.5 A in 11.7-mA Steps

* Accur

LM3646 Datasheet (1.90 MB)