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RT8477A - High Voltage High Multiple-Topology Current LED Driver

Datasheet Summary

Description

The RT8477A is a current mode PWM controller designed to drive an external MOSFET for high current LED applications with wide input voltage (4.5V to 50V) and output voltage (up to 50V) ranges.

Features

  • Buck Constant Current Converter.
  • High Voltage : VIN up to 50V, VOUT up to 50V.
  • 380kHz Fixed Switching Frequency.
  • Analog or PWM Control Signal for LED Dimming.
  • Internal Soft-Start to Avoid Inrush Current.
  • Under-Voltage Lockout.
  • Thermal Shutdown.

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Datasheet preview – RT8477A

Datasheet Details

Part number RT8477A
Manufacturer Richtek
File Size 196.71 KB
Description High Voltage High Multiple-Topology Current LED Driver
Datasheet download datasheet RT8477A Datasheet
Additional preview pages of the RT8477A datasheet.

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Full PDF Text Transcription

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® RT8477A High Voltage High Current LED Driver General Description The RT8477A is a current mode PWM controller designed to drive an external MOSFET for high current LED applications with wide input voltage (4.5V to 50V) and output voltage (up to 50V) ranges. With internal 380kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. LED Dimming control can be done by analog. The RT8477A is now available in the SOP-8 (Exposed Pad) package.
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