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RT8543 - 6-String 43V White LED Driver

Datasheet Summary

Description

The RT8543 is a high efficiency white LED driver.

It is designed for LCD panel that employs an LED array as the lighting source.

An integrated switch current mode Boost controller drives six strings in parallel and supports up to 10 pieces of LEDs per string.

Features

  • Wide Input Voltage : VIN 2.5V to 24V.
  • High Output Voltage : VOUT up to 43V.
  • Current Mode Boost Regulator  600kHz to 1.2MHz Switching Frequency  Up to 85% High Frequency.
  • Adjustable Full Channel Current from 5mA to 50mA and Matched to 2%.
  • Channel Current Regulation with ±3% Accuracy.
  • Dimming Controls  Direct PWM Dimming up to 20kHz and Minimum On-Time to 500ns  PWM to Analog Dimming up to 20kHz with 8 bit resolution.
  • Built-In Soft-Start to Prevent Inrush Cu.

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Datasheet preview – RT8543

Datasheet Details

Part number RT8543
Manufacturer Richtek
File Size 349.26 KB
Description 6-String 43V White LED Driver
Datasheet download datasheet RT8543 Datasheet
Additional preview pages of the RT8543 datasheet.

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Full PDF Text Transcription

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® RT8543 6-String 43V White LED Driver with Boost Regulator General Description The RT8543 is a high efficiency white LED driver. It is designed for LCD panel that employs an LED array as the lighting source. An integrated switch current mode Boost controller drives six strings in parallel and supports up to 10 pieces of LEDs per string. The internal current sinks support maximum ±2% current matching for excellent brightness uniformity in each LED string. To provide enough headroom for the operating of current sink, Boost controller monitors the minimum voltage of feedback pins and regulates an optimized output voltage for power efficiency. The RT8543 has wide input voltage range from 2.5V to 24V and provides adjustable 5mA to 50mA LED current.
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