My customer using this part in their 675W project then they find very high peak current when doing AC drop out in 10ms at 279Vac.
But it is working well at 90vac drop out.
I give them some suggest to adjust his Vcmop , Icomp , and current sensing resistor but no any improvement.
Could you suggested how to reduce this peak current?
Current sense resistor is 25m ohm. Increased to 50m ohm but the peak current almost the same (~97A)
Pls advise, thanks!
CH3=Vbulk, CH4=PFC choke current
PFC choke inductance = 539uH, core=79894-A7 HT19