High PF PSR Constant Current LED Driver
WS3230
WS3230 High PF PSR Constant Current LED Driver
Features
� ±5% LED Current Accuracy � Primary-side Sensing and Re...
Description
WS3230
WS3230 High PF PSR Constant Current LED Driver
Features
� ±5% LED Current Accuracy � Primary-side Sensing and Regulation Without
TL431 and Opto-coupler � No Auxiliary Winding For Sensing And Supplying � High Power Factor Correction � Ultra low operating current � LED Open/Short Circuit Protection � CS Resistor Short Circuit Protection � VCC over voltage protection & under voltage
lockout( UVLO) � Over Temperature Protection
Applications
� GU10 LED driver � LED spot light � Other LED lighting
General Description
WS3230 is a high precision QR primary-side feedback and regulation controller for LED lighting, optimized for flyback converter with the output power less than 30W. Since adopting primary sense and feedback control technology, the secondary sense and feedback circuit is eliminated. And WS3230 does not 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 high accurate current sense method, WS3230 realizes ±5% accuracy of LED current along with excellent line and load regulation. WS3230 offers comprehensive protection including Cycle-by-Cycle current limiting (OCP), LED open/short circuit protection, CS resistor short circuit protection, VCC UVLO,OVP and Clamp, and over temperature protection. WS3230 is available in SOT23-5 package.
Typical Application Circuit
NP NS
AC
5 VCC
G ate 2
4 Comp
1 GND
CS 3
W/T-Y026-Rev.A/0 Aug.2013
Copyright@Winsemi Micr...
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