RT4533AGJ6 Richtek

RT4533/A Asynchronous Boost Converter for 10 WLEDs General Description Features 2.5V to 5.5V Input Voltage Range The RT4533/A is a highly integrated LED driver IC capable 36.5V Open LED Protection for 10 WLEDs of driving 10 WLEDs in series. It is composed of a current PWM Dimming Brightness Control mode Boost converter integrated with a 36.5V/1.2A power 200mV / 300mV Reference Voltage with 2% switch. Accuracy The RT4533/A supports a wide input voltage range from 1.1MHz Switching Frequency 2.5V to 5.5V and runs at a fixed frequency of 1.1MHz. Built-In Soft-Start The LED current is set via an external resistor and the Over-Temperature Protection feedback voltage is regulated to 200mV / 300mV. Internal Compensation For brightness dimming, the RT4533/A supports PWM Current Limit dimming which determines the feedback reference voltage. RoHS Compliant and Halogen Free Applications Ordering Information Cellular Phones RT4533/A Package Type Digital Cameras J6 : TSOT-23-6 Probable Instruments Lead Plating System G : Green (Halogen Free and Pb Free) Marking Information Feedback Voltage RT4533GJ6 RT4533 : 200mV 0R= : Product Code RT4533A : 300mV 0R=DNN DNN : Date Code Note : Richtek products are : RoHS compliant and compatible with the current require- RT4533AGJ6 ments of IPC/JEDEC J-STD-020. 1L= : Product Code 1L=DNN Suitable for use in SnPb or Pb-free soldering processes. DNN : Date Code Simplified Application Circuit L D V OUT LX VIN V VOUT IN RT4533/A Enable EN GND FB Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS4533/A-02 September 2015 www.richtek.com 1RT4533/A Pin Configurations (TOP VIEW) VIN VOUT EN 6 5 4 23 LX GND FB TSOT-23-6 Functional Pin Description Pin No. Pin Name Pin Function 1 LX Switch Node. 2 GND Ground. 3 FB Feedback Voltage Input. Put a resistor to GND to setting the current. 4 EN Enable Control Input (PWM Dimming). 5 VOUT Output Voltage Pin. 6 VIN Supply Voltage Input. Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS4533/A-02 September 2015 www.richtek.com 2