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RT8575 - 4-String White LED Driver

Description

The RT8575 is a high efficiency LED driver with 40V I/O support.

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

An integrated switch current mode Boost controller drives four strings in parallel and supports up to 18 pieces of LEDs per string.

Features

  • z Input Operating Voltage Range 4.2V to 24V z 60V Maximum Output Voltage z Adjustable Switching Frequency : 150kHz to 500kHz z Support Up to 4 LED Strings z 50mA to 150mA LED Current Per Channel z 1% Typical LED Current Accuracy z 1% Typical LED Current Matching z Programmable Over Voltage Protection z Built-in Soft-Start, OTP z LED Short/Open Detection z RoHS Compliant and Halogen Free.

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Datasheet Details

Part number RT8575
Manufacturer Richtek
File Size 343.89 KB
Description 4-String White LED Driver
Datasheet download datasheet RT8575 Datasheet

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Full PDF Text Transcription

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® RT8575 4-String White LED Driver with Boost Regulator General Description The RT8575 is a high efficiency LED driver with 40V I/O support. It is designed for LCD panel that employs an array of LEDs as the lighting source. An integrated switch current mode Boost controller drives four strings in parallel and supports up to 18 pieces of LEDs per string. The internal current sinks support typical ±1% current mismatching 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 RT8575 has a wide input voltage operating range from 4.2V to 24V and provides adjustable 50mA to 150mA LED current.
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