WS3215 Datasheet | WINSEMI

Features - Simple low parts count - Wide input voltage range：8V to 40V - Up to 1.5A output current - Output current limit protection - Over temperature protection - Single pin on/off and brightness control using DC Voltage or PWM - Typical 5% output current accuracy - Inherent open-circuit LED protection - High efficiency (up to 97% ) - Adjustable LED constant current Applications - MR16 LEDs - Automotive lighting - Low Voltage industrial lighting - illuminated signs Typical Application Circuit Description The WS3215 is a continuous conduction mode inductive step-down converter.designed for driving single or multiple series LED efficiently from a voltage source higher than the total LED chain voltage. The device operates from an input supply between 8V and 30V and provides an external adjustable output current of up to 1.5A.Depending upon supply voltage and external ponents, the WS3215 can provide more than 10 watts of output power. The WS3215 includes the power switch and a high-side output current sensing circuit .which uses an external resistor to set the nominal average output current, and a dedicated DIM input accepts either a DC voltage or a wide range of pulsed dimming. Applying a voltage of 0.3V or lower to the DIM pin turns the output off and switches the device into a low current standby state. WS3215 using SOT89-5 package . Rev.1.0 July.2011 Copyright@Winsemi Microelectronics Co., Ltd., All right reserved. Pin Definition and Device Marking Pin Function Description Pin Name Pin No. Pin Type SW 1 Output Power 3 DIM Floating 5 VIN 6 Exposed PAD Current Monitoring Frequency Setting Floating Function Description Drain terminal of internal Power MOSFET. Signal and Power GND. Used for enabling Switch and Dimming with either a DC voltage or PWM input signal . Used for high-side output current sensing with an external sensing resistance between CSN and VIN. Power supply input. Bypass with capacitor as close to the device as...