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LM27964 - White LED Driver

General Description

The LM27964 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting.

The LM27964 can drive up to 6 LEDs in parallel along with multiple keypad LEDs, with a total output current up to 180mA.

Key Features

  • 1.
  • 2 87% Peak LED Drive Efficiency.
  • 0.2% Current Matching between Current Sinks.
  • Drives 6 LEDs with up to 30mA per LED in Two Distinct Groups, for Backlighting Two Displays (main LCD and sub LCD).
  • Dedicated Keypad LED Driver with up to 80mA of Drive Current.
  • Independent Resistor-Programmable Current Settings.
  • I2C Compatible Brightness Control Interface.
  • Adaptive 1×- 3/2× Charge Pump.
  • Extended Li-Ion Input: 2.7V to 5.5V.

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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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LM27964 www.ti.com SNOSAL6D – MAY 2005 – REVISED MAY 2013 LM27964 White LED Driver System with I2C Compatible Brightness Control Check for Samples: LM27964 FEATURES 1 •2 87% Peak LED Drive Efficiency • 0.2% Current Matching between Current Sinks • Drives 6 LEDs with up to 30mA per LED in Two Distinct Groups, for Backlighting Two Displays (main LCD and sub LCD) • Dedicated Keypad LED Driver with up to 80mA of Drive Current • Independent Resistor-Programmable Current Settings • I2C Compatible Brightness Control Interface • Adaptive 1×- 3/2× Charge Pump • Extended Li-Ion Input: 2.7V to 5.5V • Small Low Profile Industry Standard Leadless Package, WQFN-24 : (4mm x 4mm x 0.