WS3442 반도체 회로 부품 판매점
Non-isolated Buck APFC Offline LED Driver
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 WINSEMI |
WS3442 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 and DIP-7 Package
Applications
LED Candle Light
LED Bulb, Spot Light
T8/T10 LED String
Other LED Lighting
Typical Application(SOP-8 Package)
Non-isolated Buck Offline LED Driver
Description
The WS3442 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 WS3442 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 WS3442 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 WS3442 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 WS3442 is available in SOP-8 Package and DIP-7
Package.
Attention：A 22pF capacitor can be parallel with Rovp and a resistor can be parallel with the Vcc capacitor.
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WS3442 ProductDescription
Typical Application(DIP-7 Package)
Attention：A 22pF capacitor can be parallel with Rovp and a resistor can be parallel with the Vcc capacitor.
Pin Configuration and Marking Information
The WS3442 is available in SOP-8 Package and DIP-7 Package,the top marking is shown as below:
WS3442S8P
A：Product Code
X：Internal Code
BCY：Internal Code For QC
YMX：D/C
WS3442D7P
A：Product Code
X：Internal Code
BCY：Internal Code For QC
YMX：D/C
Pin Definition
Name
GND
ROVP
NC
VCC
DRAIN
CS
Pin No.
1
2
3
4
5/6
7/8
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.
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WS3442 led
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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