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WS3412H

Applications
E27 LED Bulb, Spot Light
PAR30, PAR38 Lamp
T8/T10 LED String
Other LED Lighting

Features
Internal 650V Power MOSFET
Active PFC for High Power Factor and Low THD
Critical Conduction Mode Operation
System Efficiency up to 95%
Without auxiliary winding
Excellent Line and Load Regulation
±3% LED Output Current Accuracy
Thermal Regulation Function
LED Short/Open Protection
Current Sensing Resistor Open Protection
Auto Fault Recovery
Available in SOP7 Package

Structure Type

Part No.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Non-isolation

PF0.9

WS3412H

 2A/650V

SOP7

120V/180mA

80V/180mA

External Set

 

Description
The WS3412H is a high precision non-isolated buck driver with active PFC, specially designed for universal input offline constant current LED lighting. The driver with on-chip PFC circuit achieves high power factor and low THD. Operating in critical conduction mode, the power MOSFET switching loss is reduced and the inductor is fully utilized.
The WS3412H integrates a 650V power MOSFET. With few external components, the LED output current can be precisely controlled.
The WS3412H offers rich protection functions to improve the system reliability, including LED open circuit protection,LED short circuit protection, CS resistor open circuit protection and cycle by cycle current limit. All the protection functions are auto-recovery. The system reliability is further improved by the thermal regulation function. The output current is reduced when the driver is over temperature.
The WS3412H has ultra low start up current and ultra low operating current.
The WS3412H is available in SOP7 Package.

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Solution & Support

Call +86-755-8418 2951