Three-stage switcher dimming: 100%-40%-15%

Compatible PCB with WS3442

Internal 500V Power MOSFET

Critical Conduction Mode Operation

±3% LED Current Accuracy

without Auxiliary Winding for power supplying

Efficiency up to 93%

LED Open and Short Circuit Protection

Thermal Regulation Function to avoid lights flicking

under high temperature.

 

Structure Type		Part No.	MOS	Package	App. Watt		OVP	PDF
					176-264Vac	90-264Vac
Non-isolation	PF﹥0.5	WS9822B	2A/500V	SOP7	80V/280mA 120V/220mA	80V/220mA60V/300mA	External Set
				DIP7	120V/280mA 160V/220mA	80V/300mA

 

The WS9822B is a three-stage dimming constant current LED driver with high precision and is applied to non-isolated buck LED power system. The WS9822B integrates a switch dimming circuit and can change the output current through switch shifting.The device operates in critical conduction mode and is suitable for universal input offline LED lighting to dim with three-stage by switcher.

The WS9822B utilizes proprietary current control method.It can achieve precise LED output current and excellent line regulation.

The operating current of the IC is as low as 120uA. So it doesn’t need the auxiliary winding for supplying the chip, which brings more simplified designs and lower cost.

The WS9822B adopts intelligent temperature control and thoroughly solves the problem of LED flickering under high temperature.

The WS9822B offers multiple protection functions to improve the system reliability, including LED open circuit protection, LED short circuit protection, and VCC under voltage protection.