FA5571N-D1 controller equivalent, current mode pwm controller.
Zero Current Detect Input Feedback (Input) Current Sense Input Ground Output Power Supply (No Connection) High Voltage input
※ Pin connections
VH 8
（NC） 7
VCC 6
OUT 5
FA5571N
1 ZCD 2 FB 3 IS 4 GND
a
MS6N1220
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