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WS9227

Applications
LED bulb, spot light
Other LED lighting

Features
Built-in 650V 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
VCC under-voltage protection
Over temperature protection
Available in DIP-8 package and SOP-7 package
 

Structure Type

Part NO.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Isolation

PF0.5

WS9227

3A/650V

DIP8

48W

36W

External Set

WS9227.pdf 

 
Description
The WS9227 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 fly back convertor under universal input. The output power of system is recommended to less than 24W.
The WS9227integrates 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 are realized.
Since using the proprietary high accurate current sense method, theWS9227 realizes ±5% accuracy of LED current along with excellent line and load regulation.
The WS9227 offers rich protection functions including LED open/short circuit protection, over-temperature protection, VCC under voltage protection.
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Return Policy

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Solution & Support

Call +86-755-8418 2951