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WS3441A Datasheet Preview

WS3441A Datasheet

Non-isolated Buck Offline LED Driver

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WS3441A ProductDescription
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 SOP-8 Package
Applications
LED Candle Light
LED Bulb, Spot Light
T8/T10 LED String
Other LED Lighting
Typical Application
Non-isolated Buck Offline LED Driver
Description
The WS3441A 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 WS3441A 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 WS3441A 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 WS3441A 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 WS3441A is available in SOP-8 Package.
AttentionA 22pF capacitor can be parallel with Rovp and a resistor can be parallel with the Vcc capacitor.
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
Copyright@WinsemiMicroelectronics Co.,Ltd.,All rightreserved
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
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WINSEMI

WS3441A Datasheet Preview

WS3441A Datasheet

Non-isolated Buck Offline LED Driver

No Preview Available !

WS3441A ProductDescription
Pin Configuration and Marking Information
The WS3441A is available in SOP-8 Packagethe top marking is shown as below:
WS3441AS8P
AProduct Code
XInternal Code
BCYInternal Code For QC
YMXD/C
Pin Definition
Name
GND
ROVP
NC
VCC
DRAIN
CS
Pin No.
1
2
3
4
5/6
7/8
Internal Block Diagram
Description
Ground
Over Voltage Protection Setting Pin. Connect a resistor to GND
No Connection. Should be connected to GND(Pin1)
Power Supply Pin
Internal HV Power MOSFET Drain.
Current Sense Pin. Connect a sense resistor between this pin and GND pin.
www.wWiInNSsEeMmI iM.cICoROmELECTTReOlN:IC+S86-7W5I5N-S8EM2I50M6IC2R8O8ELECTROFNaICxS:
WINSEMI MICROELECTRONICS
+86-755-8250 6299
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Part Number WS3441A
Description Non-isolated Buck Offline LED Driver
Maker WINSEMI
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WS3441A Datasheet PDF





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