EVB_RT4533AGJ6

RT4533AGJ6 Evaluation Board your power partner. Asynchronous Boost Converter for 10 WLEDs Purpose The RT4533A 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. For brightness dimming, the RT4533A supports PWM dimming which determines the feedback reference voltage. Table of Contents Purpose ................................................................................................................................................................. 1 Introduction............................................................................................................................................................ 2 Key Performance Summary Table .......................................................................................................................... 2 Bench Test Setup Conditions ................................................................................................................................. 3 Schematic, Bill of Materials & Board Layout ........................................................................................................... 5 More Information.................................................................................................................................................... 7 Important Notice for Richtek Evaluation Board ....................................................................................................... 7 EVB_RT4533AGJ6-00 July 2016 1 http://www.richtek.com RT4533AGJ6 Evaluation Board your power partner. Introduction General Product Information The RT4533A 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 RT4533A 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 voltage is regulated to 300mV. For brightness dimming, the RT4533A supports PWM dimming which determines the feedback reference voltage. Product Features           2.5V to 5.5V Input Voltage Range 36.5V Open LED Protection for 10 WLEDs PWM Dimming Brightness Control 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 Key Performance Summary Table Key Features Evaluation Board Number : PCB072_V1 Default Input Voltage 2.5V to 5.5V Max Output Current 20mA Default Output Voltage 36.5V Default Marking & Package Type RT4533AGJ6, TSOT-23-6 Operation Frequency Steady 1.1MHz at all loads Protection UVLO, OVP, OCP, Thermal Shutdown EVB_RT4533AGJ6-00 July 2016 2 http://www.richtek.com RT4533AGJ6 Evaluation Board your power partner. Bench Test Setup Conditions Headers Description and Placement Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at evb_service@richtek.com. Test Points The EVB is provided with the test points and pin names listed in the table below. Test Point/ Pin Name Signal Name Description LX Switch Node This is the switching node of the IC. Connect the switched side of the inductor to LX. This pin is also used to sense the output voltage for open LED protection. GND Ground Ground. FB Feedback Voltage Input Connect the sense resistor from FB to GND. EN Enable Control Input Control pin of the boost converter. It is a multifunctional pin which can be used for enable control and PWM dimming. VOUT Output Voltage The output supply pin for the IC. VIN Supply Voltage Input The input supply pin for the IC. Support 2.5V to 5.5V Input Voltage. EVB_RT4533AGJ6-00 July 2016 3 http://www.richtek.com RT4533AGJ6 Evaluation Board your power partner. Power-Up & Measurement Procedure 1. Apply 3.6V nominal input power supply (2.5V < VIN < 5.5V) to the VIN and GND terminals. 2. The EN voltage is pulled to logic high by internal circuit to enable operation. Drive EN high (>1.05V) to enable operation or low (