RT8458D Datasheet - Richtek

RT8458D, Constant Current PWM Buck Controller

® RT8458D High Voltage, High Efficiency, Constant Current PWM Buck Controller for LED Lighting General .
The RT8458D is a PWM controller with an internal high side gate driver.

Features

* a 160kHz fixed frequency oscillator, an internal
* 220mV precision reference, and a PWM comparator with latching logic. The accurate output LED current is achieved by an averaging current feedback loop and the LED current dimming can be easily controlled via the ACTL pin. The RT8458D also has

Applications

* E27, PAR30, Offline LED Lights Marking Information 13=DNN 13= : Product Code DNN : Date Code Simplified Application Circuit RVCC CVCC CVC2 RVC CVC1 RT8458D VCC ACTL VC GATE GND SENSE CIN D2 VIN Analog Dimming Q1 RS D1 L1 COUT LED+ LED- Copyright ©2014 Richtek Technology Corpora

RT8458D-Richtek.pdf