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LM3631 - Complete LCD Backlight and Bias Power

Description

The LM3631 is a complete LCD backlight and bias power solution for mobile devices.

This one-chip solution has an integrated high-efficiency backlight LED driver and positive/negative bias supplies for LCD drivers addressing the power requirements of high-definition LCDs.

Features

  • 1 Drives up to Two Strings with Maximum of Eight LEDs in Series.
  • Integrated Backlight Boost with 29-V Maximum Output Voltage.
  • Two Low-Side Constant-Current LED Drivers with 25-mA Maximum Output Current.
  • Backlight Efficiency Up to 90%.
  • 11-Bit Linear or Exponential Dimming with up to 17-Bit Output Resolution.
  • External PWM Input for CABC Backlight Operation.
  • LCD Bias Efficiency > 85%.
  • Programmable Positive LCD bias, 4-V to 6-V,.

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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 LM3631 Complete LCD Backlight and Bias Power LM3631 SNVS834 – AUGUST 2014 1 Features •1 Drives up to Two Strings with Maximum of Eight LEDs in Series – Integrated Backlight Boost with 29-V Maximum Output Voltage – Two Low-Side Constant-Current LED Drivers with 25-mA Maximum Output Current • Backlight Efficiency Up to 90% • 11-Bit Linear or Exponential Dimming with up to 17-Bit Output Resolution • External PWM Input for CABC Backlight Operation • LCD Bias Efficiency > 85% • Programmable Positive LCD bias, 4-V to 6-V, 100-mA Maximum Output Current • Programmable Negative LCD bias, –4-V to –6-V, 80-mA Maximum Output Current • Two Positive Programmable LDO Reference Outputs – 4-V to 6-V, 50-mA Maximum O
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