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UCC2818A / basic question about PFC

Guru 29720 points

Other Parts Discussed in Thread: UCC2818A

Hi,

I'd like to ask basic question about PFC.

If AC line has parasitic inductance and current phase is delayed 90°( like attatched file), Does PFC operate normally?

*green=voltage, orange=current

The background of this question is that my customer is evaluate UCC2818A on his board and test in end customer's environment, but I heard application doesn't operate normally. It isn't known whether there is a problem with the PFC(UCC2818A).

According to my customer, input current phase is delayed 90° relative to input AC voltage in end customer's environment .

Although it is still lack of information, Please advise me if possible.

Regards,

Yaita