WS3221 Datasheet

Features and Benefits

■ Built-in 650V Power MOSFET
■ ±5% LED Current Accuracy
■ Primary-side Sensing and Regulation Without TL431 and Opto-coupler
■ No Auxiliary Winding For Sensing And Supplying
■ Ultra low operating current
■ LED Open/Short Circuit Protection
■ External programmable LED Open voltage
■ CS Resistor Short.