This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC28019A: Dynamic response enquiry

Part Number: UCC28019A

Hi Team,

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