Product Page

WS9442P

Applications
LED Bulb Lights
LED Panel Lights
LED Strings

Features
Critical Conduction Mode Operation
Internal 500V Power MOSFET
Gate Drive and No Auxiliary Winding
±3% LED Current Accuracy
Efficiency up to 93%
LED Short Circuit Protection
LED Open Circuit Protection
Current Sense Resistor Short Protection
Thermal Regulation Function
External PWM Dimming
 

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

 

160V/220mA

 

Description
The WS9442P is a high precision buck constant current LED driver and is applied to non-isolated buck LED power system with
AC input voltage of 85VAC-265VAC. The WS9442P integrates a 500V power MOSFET, and can achieve excellent constant current
performance with very few external components, so the system cost and size are minimized. The driver operates in critical
conduction mode, and the output current does not change with the inductance and LED output voltage. The operating current of the
IC is 200uA, so it doesn’t need the auxiliary winding for supplying the chip, thus simplify design and reduce cost.
The WS9442P adopts intelligent temperature control and thoroughly solves the problem of LED flickering under high temperature. It integrates an external dimming pin which inputs PWM signal and can dim by changing the duty cycle of the PWM
signal. The WS9442P offers full protection functions to improve the system reliability, including LED open circuit protection, LED
short circuit protection, CS resistor short circuit protection and thermal regulation function.
The WS9442P is available in DIP-7 Package.
Ship Worldwide

On your account or prepay

Payment Safe

100% Guarantee

Return Policy

30 Days Service

Solution & Support

Call +86-755-8418 2951