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LM3643 Datasheet Synchronous Boost Dual Led Flash Driver

Manufacturer: Texas Instruments

Overview: Product Folder Sample & Buy Technical Documents Tools & Software Support & munity LM3643, LM3643A SNVS967A – AUGUST 2014 – REVISED NOVEMBER 2014 LM3643 Synchronous Boost Dual LED Flash Driver with 1.

General 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.

The total LED current the LM3643 boost can deliver is 1.5 A (ILED1 + ILED2 ).

Key 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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