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LM3643 - Synchronous Boost Dual LED Flash Driver

Description

The LM3643 is a dual LED flash driver that provides a high level of adjustability within a small solution size.

The LM3643 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 1.5 A Total Allowed LED Current During Operation (ILED1 + ILED2 = 1.5 A).
  • Dual Independent LED Current Source Programmability.
  • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A.
  • Optimized Flash LED Current During Low Battery Conditions (IVFM).
  • > 85% Efficiency in Torch Mode (@ 100 mA) and Flash Mode (@1 A to 1.5 A).
  • Grounded Cathode LED Operation for Improved Thermal Management.
  • Small Solution Size: < 16 mm2.

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Other Datasheets by Texas Instruments

Part Number Description
LM3643A Synchronous Boost Dual LED Flash Driver
LM3642 1.5-A Synchronous Boost 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
LM3646 1.5-A Synchronous Boost Converter

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3643, LM3643A SNVS967A – AUGUST 2014 – REVISED NOVEMBER 2014 LM3643 Synchronous Boost Dual LED Flash Driver with 1.5-A High-Side Current Sources 1 Features •1 1.5 A Total Allowed LED Current During Operation (ILED1 + ILED2 = 1.5 A) • Dual Independent LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Optimized Flash LED Current During Low Battery Conditions (IVFM) • > 85% Efficiency in Torch Mode (@ 100 mA) and Flash Mode (@1 A to 1.
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