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RT8576 - High Voltage 8-CH LED Driver

General Description

The RT8576 is an 8-CH LED driver capable of delivering 120mA for each channel.

The RT8576 is a current mode boost converter with an adjustable switching frequency via the OSC pin from 100kHz to 1MHz and a wide VIN range from 9V to 28V.

Key Features

  • z Wide Input Supply Voltage Range : 9V to 28V z Adjustable Boost Controller Switching Frequency from 100kHz to 1MHz z Programmable Channel Current z Channel Current Matching : ±3% z External Dimming Control z Boost MOSFET Over Current Protection z Automatic LED Open/Short Protection to Avoid Output Over Voltage z VIN Under Voltage Lockout z Adjustable Over Voltage Protection z Under Voltage Protection z Thermal Shutdown Protection z Abnormal State Indicator for Open/Short/Thermal Condition z RoH.

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Datasheet Details

Part number RT8576
Manufacturer Richtek
File Size 205.22 KB
Description High Voltage 8-CH LED Driver
Datasheet download datasheet RT8576 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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RT8576 High Voltage 8-CH LED Driver General Description The RT8576 is an 8-CH LED driver capable of delivering 120mA for each channel. The RT8576 is a current mode boost converter with an adjustable switching frequency via the OSC pin from 100kHz to 1MHz and a wide VIN range from 9V to 28V. The PWM output voltage loop selects and regulates the LED pin with the highest voltage string to 0.6V, hence allowing voltage mismatches between LED strings. The RT8576 automatically detects and disconnects any unconnected and/or broken strings during operation from PWM loop to prevent VOUT from over voltage. The 3% matched LED currents on all channels are simply programmed with a resistor. A very high contrast ratio true digital PWM dimming can be achieved by driving the PWM pin with a PWM signal.