RT8458A Datasheet - Richtek

RT8458A High Efficiency PWM Buck LED Driver Controller

The RT8458A is a PWM controller with an integrated high side gate driver. 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 RT8458A can be up to 100% for wider input voltage application, such as E27 and .

RT8458A Features

* a 47kHz 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 RT8458A also has

RT8458A-Richtek.pdf