RT4533A - Richtek

RT4533A Asynchronous Boost Converter

The RT4533/A is a highly integrated LED driver IC capable of driving 10 WLEDs in series. It is composed of a current mode Boost converter integrated with a 36.5V/1.2A power switch. The RT4533/A supports a wide input voltage range from 2.5V to 5.5V and runs at a fixed frequency of 1.1MHz. The LED current is set via an external resistor and the feedback voltag.

Features

 2.5V to 5.5V Input Voltage Range
 36.5V Open LED Protection for 10 WLEDs
 PWM Dimming Brightness Control
 200mV / 300mV Reference Voltage with ±2% Accuracy
 1.1MHz Switching Frequency
 Built-In Soft-Start
 Over-Temperature Protection
 Internal Compensation
 Current Limit
 RoHS Compliant and Halogen Free Ordering Information RT4533/A Package Type J6 : TSOT-23-6 Lead Plating System G : Green (Halogen Free and Pb Free) Note : Feedback Voltage RT4533 : 200mV RT4533A : 300mV Richtek products are :  RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-0.