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WS9221

Applications
GU10/E27 LED bulb, spot light
Other LED lighting

Features
Built-in650V Power MOSFET
Constant current control without secondary sense and feedback circuit.
No Auxiliary winding for sensing and supplying
Ultra low operating current to improve efficiency
Universal input voltage
±5% LED current accuracy
LED short and open circuit protection
CS resistor short circuit protection
VCC under-voltage protection
Over temperature protection
Available in SOP-7 package
 

Structure Type

Part NO.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Isolation

PF0.5

WS9221

1A/650V

SOP7

7W

5W

External Set

WS9221.pdf 

 
Description
The WS9221 is a high precision primary-side feedback and regulation controller for LED lighting, it operates in constant current control mode and is designed to work in inductor current discontinuous conduction mode and especially suitable for flyback convertor under universal input.The output power of system is recommended to less than 5W.
The WS9221integrates 650V power MOSFET. Since adopting primary sense and feedback control technology, the secondary sense and feedback circuit is eliminated. The loop compensation components are also removed while maintaining stability overall operating conditions. The operating current is very low, and it doesn’t need the auxiliary winding for sensing the output current and supplying the chip.The low component counts and small system size arerealized.Since using the proprietary high accurate current sense method, theWS9221 realizes ±5% accuracy of LED current along with excellent line and load regulation.
The WS9221 offers rich protection functions including LED open/short circuit protection, CS resistor short circuit protection, over-temperature protection, VCC under voltage protection.
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Money Return

100% Guarentee

Return Policy

30 Days Service

Solution & Support

Call +86-755-8418 2951