RT8453B Datasheet - Richtek

RT8453B, High Voltage Buck LED Driver

RT8453B 1.5A, 500kHz, 40V High Voltage Buck LED Driver General .
The RT8453B is a buck current mode PWM regulator for LED driving applications.

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

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. Dim

RT8453B-Richtek.pdf