WS3441A PDF datasheet can download.
This product has Non-isolated Buck Offline LED Driver functions.
This is one of the semiconductor types. This part name is WS3441A.
Manufacturers of the product is WINSEMI.
Image and pinout :
Some of the text files within the PDF file
Features Critical Conduction Mode Operation Internal 500V Power MOSFET No Auxiliary Winding Ultra Low Operating Current ±3% LED Output Current Accuracy Efficiency up to 93% LED Open Protection LED Short Protection Current Sensing Resistor Short Protection Thermal Regulation Function Available in SOP-8 Package Applications LED Candle Light LED Bulb, Spot Light T8/T10 LED String Other LED Lighting Typical Application Non-isolated Buck Offline LED Driver
The WS3441A is a high precision buck constant current LED driver. The device operates in critical conduction mode and is suitable for 85Vac~265Vac universal input offline LED lighting. The WS3441A integrates a 500V power MOSFET. The operating current of the IC is very low. So it doesn’t need the auxiliary winding for supplying the chip. It can achieve excellent constant current performance with very few external components, so the system [ … ]
Please refer to the file for details.