UCC28070A: Design 1 KW PFC Converter using UCC28070 Controller

Hi Aaqib,

Thank you for the query on UCC28070.

I checked the sheet and most of it looks fine. 

It would be better if you change the following to the recommended values:

1. Rsa, Rsb to 41ohm as it better in full scale accuracy.

2. RDMX needs to be selected according to the required Dmax value. For 0.94 use the correct value recommended.

3. Rimo seems to be lot of difference. Please stick with the tool recommended values, else choosing a higher value will produce more output power.

4. Also the please choose the compensation values for current loop/ voltage loop as close as possible to calculated values.

Please let us know if you have further questions.

Regards,

Harish