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LP8553 - High-Efficiency LED Backlight Driver

General Description

The LP8553 is a white LED driver with integrated boost converter.

It has four adjustable current sinks which can be controlled by PWM input or with I2Ccompatible serial interface.

The boost converter has adaptive output-voltage control based on the LED driver voltages.

Key Features

  • 1.
  • 2 High-Voltage DC/DC Boost Converter with Integrated FET with Four Switching Frequency Options: 156/312/625/1250 kHz.
  • 2.7V to 22V Input Voltage Range to Support 1x…5x Cell Li-Ion Batteries.
  • Programmable PWM Resolution.
  • 8 to 13 True Bit (Steady State).
  • Additional 1 to 3 Bits Using Dithering During Brightness Changes.
  • I2C and PWM Brightness Control.
  • Automatic PWM & Current Dimming for Improved Efficiency.
  • PWM Output Frequenc.

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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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LP8553 www.ti.com SNVS701B – SEPTEMBER 2011 – REVISED JANUARY 2014 LP8553 High-Efficiency LED Backlight Driver for Notebooks Check for Samples: LP8553 FEATURES 1 •2 High-Voltage DC/DC Boost Converter with Integrated FET with Four Switching Frequency Options: 156/312/625/1250 kHz • 2.