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UCC28056: Error in datasheet or design calculator?

Ola Baath
Prodigy 40 points
Part Number: UCC28056

Hi,

I am working on a 90-260V PFC converter. Right now I am having some stability issues, I've been using the datasheet compensator design and also the design calculator. To increase my confusion it doesn't seem like the calculator calculates the suggested compensation values the same way as the datasheet does. Please help me understand this.

Kind regards,

  • 0
    TI__Mastermind 26225 points

    Hi Ola,

    Sorry for the issues. I suggest to follow the compensation guidance in the datasheet, I'll look into why the excel calculator is not matching the datasheet. If you could share with me some waveforms for COMP and VOSNS, it would helpful for me to understand what is happening.

    Best Regards,

    Ben Lough