Copyright@Winsemi Microelectronics Co., Ltd., All right reserved.

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

B1 1222

Features



TRIAC dimmable



Internal 300V Power MOSFET



Critical Conduction Mode Operation



Ultra Low Operating Current



±

5% LED Output Current Accuracy



LED Open Protection



LED Short Protection



Current Sensing Resistor Short Protection



VCC Under Voltage Protection



Thermal Regulation Function



Available in SOP-8 Package

Typical Appliction



LED Candle Light



LED Bulb



Other LED Lighting

Description

The WS9841 is a high efficiency TRIAC dimmable LED

driver. The device operates in critical conduction mode and is

suitable for buck, buck-boost or fly-back LED lighting.

The WS9841 integrates a 300V power MOSFET. It

utilizes patent pending MOSFET driving technique and

current sensing method. The operating current of the IC is

very low. With very few external components count, it can

achieve excellent constant current performance, so the

system cost and size are greatly reduced.

The WS9841 offers rich protection functions to improve

the system reliability, including LED open circuit protection,

LED short circuit protection, VCC under voltage protection,

CS resistor short circuit protection and thermal regulation

function.

The WS9841 is available in a SOP-8 Package.

Typical Application Circuit

WS9841 High Efficiency TRIAC dimmable LED

Driver