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RT8458D

Part Number	RT8458D
Manufacturer	Richtek
Description	Constant Current PWM Buck Controller
Published	Mar 19, 2020
Detailed Description	® RT8458D High Voltage, High Efficiency, Constant Current PWM Buck Controller for LED Lighting General Description The...
Datasheet	RT8458D PDF File

Overview

® RT8458D High Voltage, High Efficiency, Constant Current PWM Buck Controller for LED Lighting General Description The RT8458D is a PWM controller with an internal high side gate driver.
Because of the Buck topology, the input voltage for the Buck system is only limited by the voltage rating of the external MOSFET.
It is used for step down converters by well controlling the external MOSFET and regulating a constant output current.
The output duty cycle of the RT8458D can be up to 100% for wider input voltage application.
The RT8458D also features a 160kHz fixed frequency oscillator, an internal −220mV precision reference, and a PWM comparator with latching logic.
The accurate output LED cu...

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