WS3412AH Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – Non-isolated Buck APFC Offline LED Driver

WS3412AH ProductDescription
Features
 Specially Optimized for the EMI
 Internal 600V 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
Applications
 E27 LED Bulb, Spot Light
 PAR30, PAR38 Lamp
 T8/T10 LED String
 Other LED Lighting
Typical Application
Non-isolated Buck APFC Offline LED Driver
Description
The WS3412AH 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 WS3412AH integrates a 600V power MOSFET. With
few external components, the LED output current can be
precisely controlled.
The WS3412AH 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 WS3412AH has ultra low start up current and ultra
low operating current.
The WS3412AH is available in SOP7 Package.
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