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RT8453B - High Voltage Buck LED Driver

General Description

The RT8453B is a buck current mode PWM regulator for LED driving applications.

It provides an integrated 1.5A switch and can be operated with a wide input voltage range from 4.5V to 40V.

Key Features

  • z Input Operating Range 4.5 to 40V z 1.5A Switching Current Limitation z 10% Constant Current Output Accuracy z Current Mode PWM with 500kHz Switching Frequency z Analog or PWM Control Signal for LED Dimming z Programmable Soft-Start z Input Under Voltage Lockout z Over Temperature Protection z RoHS Compliant and Halogen Free.

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Datasheet Details

Part number RT8453B
Manufacturer Richtek
File Size 135.91 KB
Description High Voltage Buck LED Driver
Datasheet download datasheet RT8453B 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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RT8453B 1.5A, 500kHz, 40V High Voltage Buck LED Driver General Description The RT8453B is a buck current mode PWM regulator for LED driving applications. It provides an integrated 1.5A switch and can be operated with a wide input voltage range from 4.5V to 40V. With a 500kHz operating frequency, the RT8453B allows all external inductor and input/output capacitors to be small. High efficiency is achieved with its 190mV current sensing capability. Dimming can be either analog or PWM digital signal driven. The RT8453B is available in a small SOP-8 (Exposed pad) package.