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RT8577A

Part Number	RT8577A
Manufacturer	Richtek
Description	High Voltage 4-CH LED Driver
Published	Oct 20, 2021
Detailed Description	® RT8577A High Voltage 4-CH LED Driver General Description The RT8577A is an 4-CH LED driver capable of delivering 120...
Datasheet	RT8577A PDF File

Overview

® RT8577A High Voltage 4-CH LED Driver General Description The RT8577A is an 4-CH LED driver capable of delivering 120mA for each channel.
The RT8577A is a current mode boost converter with an adjustable switching frequency via the RT pin from 200kHz to 2.
1MHz and a wide VIN range from 5.
5V to 40V.
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 RT8577A automatically detects and disconnects any unconnected and/or broken strings during operation from PWM loop to prevent VOUT from over voltage.
The 1.
5% matched LED currents on all channels are simply programmed with a resistor.
A...

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