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LM3556 - 1.5-A Synchronous Boost LED Flash Driver

General Description

The LM3556 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED.

The high-side current source allows for grounded cathode LED operation providing flash current up to 1.5 A.

Key Features

  • 1 Grounded Cathode LED Operation for Improved Thermal Management.
  • 1.5-A High-Side Current Source for Single LED.
  • Accurate and Programmable LED Current from 46.9 mA to 1.5 A.
  • > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.5 A).
  • Small Solution Size: < 20 mm2.
  • LED Thermal Sensing and Current Scale-Back.
  • Soft-Start Operation for Battery Protection.
  • Hardware Enable Pin.
  • Hardware Torch Enable.

📥 Download Datasheet

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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 LM3556 SNVS796D – AUGUST 2011 – REVISED OCTOBER 2015 LM3556 1.5-A Synchronous Boost LED Flash Driver With High-Side Current Source 1 Features •1 Grounded Cathode LED Operation for Improved Thermal Management • 1.5-A High-Side Current Source for Single LED • Accurate and Programmable LED Current from 46.9 mA to 1.5 A • > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.