Dear Lisa,
I measure the Pin 5 of UCC28019A and the voltage is 2.4V( with loading 280Ω)PFC Output Voltage is DC 390(with no Load).
PFC Output Voltage is DC 161 V input is AC 110 V
I have two board . one can add the load 500W , no problem ( with one MOS ) and will burn with two MOS)
Do you have any opinions about that ?
Best regards,
Edward Wu