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WS3412AH 반도체 회로 부품 판매점

Non-isolated Buck APFC Offline LED Driver



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WS3412AH 데이터시트, 핀배열, 회로
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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WS3412AH 데이터시트, 핀배열, 회로
WS3412AH ProductDescription
Pin Configuration and Marking Information
The WS3412AH is available in SOP7 Packagethe top marking is shown as below:
WS3412AHS7P
AProduct Code
XInternal Code
BCYInternal Code For QC
YMXD/C
Pin Definition
Name
Pin No.
COMP
1
GND
VCC
2
3
FB 4
D 5/6
CS 7
Internal Block Diagram
Description
Loop Compensation Node. This pin connects a capacitor to GND for stabilization of the
control loop, achieving accurate LED current, high Power Factor and low THD.
Ground.
Power Supply Pin. Connect a bypass capacitor from this pin to GND.
Feedback Voltage Input Pin. This pin detects the inductor demagnetization signal and the
output voltage.
Internal HV Power MOSFET Drain.
Current Sense Pin. Connect a resistor to GND to sense the inductor current.
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WS3412AH led

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WS3412AH

Non-isolated Buck APFC Offline LED Driver - WINSEMI