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RT4501A - High Efficiency Backlight LED Driver

Download the RT4501A datasheet PDF. This datasheet also covers the RT4501 variant, as both devices belong to the same high efficiency backlight led driver family and are provided as variant models within a single manufacturer datasheet.

General Description

The RT4501/A 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 7 WLEDs in 2 String.
  • External PWM/Pulse Brightness Control.
  • 550k/1.1MHz Switching Frequency.
  • Built-in Internal Soft-Start.
  • PWM Dimming/Pulse Dimming Resolution 256/128 Steps.
  • I2C Programmable 256 Steps Linear Current Regulation.
  • Up to 85% Efficiency with Small Magnetics.
  • Programmable 16V/25.5V OVP.
  • Current Accuracy ±5% and.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT4501-RichtekTechnology.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT4501A
Manufacturer Richtek Technology
File Size 263.96 KB
Description High Efficiency Backlight LED Driver
Datasheet download datasheet RT4501A Datasheet

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Other Datasheets by Richtek Technology

Part Number Description
RT4501 High Efficiency Backlight LED Driver
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RT4503A Asynchronous Boost Converter
RT4528 High Voltage Buck LED Driver
RT4532 High Efficiency Backlight LED Driver

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.

View original datasheet text
® RT4501/A High Efficiency Backlight LED Driver General Description The RT4501/A 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 RT4501 supports linear mappings with 256 steps to setup the brightness of backlight LEDs. It also supports PWM dimming to adjust the brightness. For brightness dimming, the RT4501A supports 128 steps pulse dimming which determines the LED current, and RT4501 support 256 steps PWM dimming which determines the LED current.