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WS3443

Applications
LED Candle Light
LED Bulb, Spot Light
T8/T10 LED String
Other LED Lighting

Features
Critical Conduction Mode Operation
Internal 500V Power MOSFET
No Auxiliary Winding
Ultra Low Operating Current
±3% LED Output Current Accuracy
Efficiency up to 93%
LED Open Protection
LED Short Protection
Current Sensing Resistor Short Protection
Thermal Regulation Function
Available in DIP-7 Package
 

Structure Type

Part No.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Non-isolation

PF0.5

WS3443

-

DIP7

160V/280mA

80V/380mA

External Set

WS3443.pdf

 

 
Description
The WS3443 is a high precision buck constant current LED driver. The device operates in critical conduction mode and is suitable for 85Vac~265Vac universal input offline LED lighting.
The WS3443 integrates a 500V power MOSFET. The operating current of the IC is very low. So it doesn’t need the auxiliary winding for supplying the chip. It can achieve excellent constant current performance with very few external components, so the system cost and size are minimized.
The WS3443 utilizes patent pending current control method. It can achieve precise output current and excellent
line regulation. The driver operates in critical conduction mode, the output current does not change with the inductance and LED output voltage.
The WS3443 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 WS3443 is available in DIP-7 Package.
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Solution & Support

Call +86-755-8418 2951