Datasheet4U Logo Datasheet4U.com

LM3646 - 1.5-A Synchronous Boost Converter

📥 Download Datasheet

General Description

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 LED currents remain in regulation and maximizes efficiency.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3646 SNVS962A – DECEMBER 2013 – REVISED NOVEMBER 2014 LM3646 1.

Key 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.
  • Accurate and Programmable Torch LED Current from 2.5 mA to 187 mA in 1.5-mA Steps.
  • Dual 1.5-A High-Side Current Sources for Dual LED Drive.
  • Hardware Flash and Torch Enables.
  • Hard.

More Datasheets from Texas Instruments

Part Number Description
LM3642 1.5-A Synchronous Boost LED Flash Driver
LM3643 Synchronous Boost Dual LED Flash Driver
LM3643A Synchronous Boost Dual LED Flash Driver
LM3644 Dual 1.5-A Current Source Camera Flash LED Driver
LM3644TT Dual 1.5-A Current Source Camera Flash LED Driver
LM3648 Synchronous Boost LED Flash Driver
LM360 High Speed Differential Comparator
LM360M High Speed Differential Comparator
LM361 High Speed Differential Comparators
LM361H High Speed Differential Comparators