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LM3646 - 1.5-A Synchronous Boost Converter

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.

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.

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Other Datasheets by Texas Instruments

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LM3642 1.5-A Synchronous Boost LED Flash Driver
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LM3643A Synchronous Boost Dual LED Flash Driver
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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 LM3646 SNVS962A – DECEMBER 2013 – REVISED NOVEMBER 2014 LM3646 1.5-A Synchronous Boost Converter With Dual High-Side Current Sources and I2C-Compatible Interface 1 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.