UCC28180: UCC28180 Power related issue

Bharat Chauhan

Part Number: UCC28180

Hello Sir,

I have designed PFC for 960W Output power.

When Output power increase above 900W then input current wave form is distorted.

Please give any suggestion to resolve this issue.

Regards,

Bharat

0 Yunsheng Qu over 4 years ago

Hi, Bharat

Could you offer waveforms on input current and ICOMP pin of UCC28180?

Normally, current shunt of PFC affect the current waveform of input current, you can try decrease current shunt a little bit first.

BR,

Yunsheng

0 Bharat Chauhan over 4 years ago in reply to Yunsheng Qu

Hello,

please find attached wave form of input current.

Regards,

Bharat

0 Yunsheng Qu over 4 years ago in reply to Bharat Chauhan

Hi, Bharat

Based on your waveform, I think it is related to the large current shunt, could you decrease current shunt to half value of original value?

Yunsheng

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