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RT8491 - High Voltage 6-CH LED Driver Controller

Description

The RT8491 is a 6-CH LED driver controller that delivers well matched LED current to each channel of LED string.

With external current sources, the number of LEDs per string is only limited by the current source and the VIN/ VOUT conditions.

Features

  • Wide Operation Voltage Range : 9V to 32V.
  • Programmable Channel Current.
  • 3% Current Matching Accuracy between Channels.
  • Programmable Switching Frequency.
  • Easy Analog and Digital Dimming Control.
  • Programmable Soft-Start.
  • LED Open Channel Detection and Protection.
  • LED Short-Fault Detect Latch Off Multiple LED Strings.
  • Programmable Output Over Voltage Protection.
  • Under Voltage Lockout and Thermal Shutdown.
  • 32-Lead WQFN Package.

📥 Download Datasheet

Datasheet Details

Part number RT8491
Manufacturer Richtek
File Size 362.39 KB
Description High Voltage 6-CH LED Driver Controller
Datasheet download datasheet RT8491 Datasheet

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Full PDF Text Transcription

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® RT8491 High Voltage 6-CH LED Driver Controller General Description The RT8491 is a 6-CH LED driver controller that delivers well matched LED current to each channel of LED string. With external current sources, the number of LEDs per string is only limited by the current source and the VIN/ VOUT conditions. The current mode PWM boost type controller operates at a programmable switching frequency of up to 1MHz, with a wide VIN range covering from 9V to 32V. The switch driver is designed to drive industrial grade high power MOSFETs. The PWM loop selects and regulates the LED string with the highest voltage string to 0.9V, thus allowing voltage mismatches between the LED strings.
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