WS3412 ProductDescription
Pin Configuration and Marking Information
The WS3412 is available in SOP8 Package，the top marking is shown as below:
WS3412S8P
A：Product Code
X：Internal Code
BCY：Internal Code For QC
YMX：D/C
Pin Definition
Name
Pin No.
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.
COMP
1
GND
VCC
2
3
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.
FB
4
D
5/6
7/8
Internal HV Power MOSFET Drain.
CS
Current Sense Pin. Connect a resistor to GND to sense the inductor current.
Internal Block Diagram
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2/8
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