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LM3644 Datasheet Dual 1.5-a Current Source Camera Flash Led Driver

Manufacturer: Texas Instruments

Overview: Product Folder Sample & Buy Technical Documents Tools & Software Support & munity LM3644, LM3644TT SNVSA52E – AUGUST 2014 – REVISED SEPTEMBER 2016 LM3644 Dual 1.

General 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.

The dual 128 level current sources provide the flexibility to adjust the current ratios between LED1 and LED2.

Key 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.
  • Sma.

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LM3644 Distributor