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LM3559 - Synchronous Boost Flash Driver

General Description

The LM3559 is a 2-MHz fixed-frequency synchronous boost converter with two 900-mA constant current drivers for high-current white LEDs.

The dual highside current sources allow for grounded cathode LED operation and can be tied together for providing flash currents of up to 1.8 A.

Key Features

  • 1 Dual High-Side Current Sources Allow for Grounded Cathode LED Operation.
  • Accurate and Programmable LED Current from 28.125 mA to 1.8 A.
  • Optimized Flash Current During Low Battery Conditions.
  • Independent LED Current Source Programmability.
  • Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator.
  • 4-Bit Analog-to-Digital (ADC) for VLED Monitoring.
  • Battery Voltage Sensing and Current Scale-Back.
  • LED Sensing.

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Other Datasheets by Texas Instruments

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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 LM3559 SNVS624B – JUNE 2011 – REVISED JUNE 2016 LM3559 Synchronous Boost Flash Driver With Dual 900-mA High-Side Current Sources (1.8-A Total Flash Current) 1 Features •1 Dual High-Side Current Sources Allow for Grounded Cathode LED Operation • Accurate and Programmable LED Current from 28.125 mA to 1.