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RT8511B - 43V Asynchronous Boost WLED Driver

Datasheet Summary

Description

The RT8511B is an LED driver IC that can support up to 10 WLED in series.

It is composed of a current mode boost converter integrated with a 43V/2.2A power switch running at a fixed 500kHz frequency and covering a wide VIN range from 2.7V to 24V.

Features

  • Wide Input Voltage Range : 2.7V to 24V.
  • High Output Voltage : up to 43V.
  • Direct PWM Dimming Control and Frequency from 100Hz to 8kHz.
  • Internal Soft-Start and Compensation.
  • 200mV Reference Voltage.
  • PWM Dimming with Internal Filter.
  • Programmable Over Voltage Protection.
  • Over Temperature Protection.
  • Current Limit Protection.
  • Thin 8-Lead WDFN Package.
  • RoHS Compliant and Halogen Free.

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Datasheet preview – RT8511B

Datasheet Details

Part number RT8511B
Manufacturer Richtek
File Size 137.32 KB
Description 43V Asynchronous Boost WLED Driver
Datasheet download datasheet RT8511B Datasheet
Additional preview pages of the RT8511B datasheet.

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Full PDF Text Transcription

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® RT8511B 43V Asynchronous Boost WLED Driver General Description The RT8511B is an LED driver IC that can support up to 10 WLED in series. It is composed of a current mode boost converter integrated with a 43V/2.2A power switch running at a fixed 500kHz frequency and covering a wide VIN range from 2.7V to 24V. The white LED current is set with an external resistor, and the feedback voltage is regulated to 200mV (typ.). During operation, the LED current can be controlled by the PWM input signal in which the duty cycle determines the feedback reference voltage. For brightness dimming, the RT8511B is able to maintain steady control of the LED current. Therefore, no audible noises are generated on the output capacitor.
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