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RT4532 - High Efficiency Backlight LED Driver

General Description

The RT4532 is a high-efficiency LED driver for backlight applications.

An asynchronous boost converter with an internal Schottky diode and a current source driver are designed to support 6LED/channel with wide input voltage range from 2.5V to 5.5V.

Key Features

  • Input Voltage Range : 2.5V to 5.5V.
  • Internal Schottky Diode.
  • Fast-speed mode I2C Compatible Interface.
  • Drive Up to 6 WLEDs in 4 String.
  • External PWM Brightness Control.
  • 550k/1.1MHz Switching Frequency.
  • Built-in Internal Soft-Start.
  • I2C Programmable 256 Steps Linear Current Regulation.
  • Up to 85% Efficiency with Small Magnetics.
  • Programmable 16V/24V OVP.
  • Current Accuracy ±5% and Current Balance ±3%.
  • UVLO, OVP, OCP, OTP Protection.
  • S.

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Datasheet Details

Part number RT4532
Manufacturer Richtek Technology
File Size 201.51 KB
Description High Efficiency Backlight LED Driver
Datasheet download datasheet RT4532 Datasheet

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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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® RT4532 High Efficiency Backlight LED Driver General Description The RT4532 is a high-efficiency LED driver for backlight applications. An asynchronous boost converter with an internal Schottky diode and a current source driver are designed to support 6LED/channel with wide input voltage range from 2.5V to 5.5V. An I2C interface can provide easy backlight control in fast and high speed mode. The RT4532 supports linear mappings with 256 steps to setup the brightness of backlight LEDs. It also supports PWM dimming to adjust the brightness. The RT4532 provides complete protection functions such as input under-voltage lockout, over-current, output overvoltage and over-temperature protection. The OVP threshold voltage can be set at 16V and 24V for different applications.