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LM3644TT - Dual 1.5-A Current Source Camera Flash LED Driver

This page provides the datasheet information for the LM3644TT, a member of the LM3644 Dual 1.5-A Current Source Camera Flash LED Driver family.

Description

The LM3644 is a dual LED flash driver that provides a high level of adjustability within a small solution size.

The LM3644 utilizes a 2-MHz or 4-MHz fixedfrequency synchronous boost converter to provide power to the dual 1.5-A constant current LED sources.

Features

  • 1 Dual Independent 1.5-A LED Current Source Programmability.
  • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A.
  • Torch Currents up to 360 mA (LM3644TT).
  • Flash Timeout Values up to 1.6 seconds (LM3644TT).
  • Optimized Flash LED Current During Low Battery Conditions (IVFM).
  • > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.5 A).
  • Grounded Cathode LED Operation for Improved Thermal Management.
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Datasheet preview – LM3644TT

Datasheet Details

Part number LM3644TT
Manufacturer Texas Instruments
File Size 1.44 MB
Description Dual 1.5-A Current Source Camera Flash LED Driver
Datasheet download datasheet LM3644TT Datasheet
Additional preview pages of the LM3644TT datasheet.

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Full PDF Text Transcription

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3644, LM3644TT SNVSA52E – AUGUST 2014 – REVISED SEPTEMBER 2016 LM3644 Dual 1.5-A Current Source Camera Flash LED Driver 1 Features •1 Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditions (IVFM) • > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.
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