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WS9082J

WS9082J Non-isolated Step-Down LED Driver
With Active PFC and No Auxiliary Winding

Application
 LED Lighting

Freatures
 super-THD® patented THD control technology
 Patented maximum frequency control technology
 High PF value ,low THD
 Patented temperature compensations
 Built-in 550V power MOSFET
 No auxiliary winding
 Valley switching,high efficiency,low EMI
 Automatic compensation for inductance variation
 Automatic adaption to output voltage variation
 LED short protection
 LED open protection
 Over-temperature protection
 Few external components

Structure Type

Part No.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Non-isolation

PF0.5

WS9442P

2A/500V

DIP7

120V/280mA

80V/300mA

External Set

WS9442P.pdf

 

Description
The WS9082J is an active PFC non-isolated step-down
constant currant driver。It adopts the super-THD® patented
THD control technology that makes it supplied by itself and
auxiliary winding is not need. Above all,it can’t get hot
because of this. WS9082J also adopts the patented
maximum frequency control technology to make frequency
not too high because CS is too small at input voltage trough.
Valley switching mode operation makes transformation
efficiency high, EMC low ,PF high ;and also makes output
current automatically vary with inductance and output voltage,
which really realizes the constant current driven LED.
WS9082J integrates 550V power MOSFET,which
realizes constant current output with few external
components needed.
WS9082J has muti-protection functions including ove
r-voltage protection, LED short protection, cycle-by-cycle
current protection,dynamic temperature compensation,over
-temperature protection and soft start.
WS9082J has the lower start current and work curre
nt which can drive LED efficiently in the range of full v
oltage AC input (85VAC-265VAC).
WS9082J provides 7-pin SOP-7 package.

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Solution & Support

Call +86-191 2935 1516