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UCC28056: UCC28056 PF and THD

user1932012
Intellectual 750 points
Part Number: UCC28056

1,The PFC chip part, small package really is a good idea, this single-winding control chip, we have a similar other vendor material, have a certain sacrifice to the PF value and THD, I see the DEMO scheme data posted on the TI network, The PF and THD test curves are also weird, unlike the other chip data we used to use, this doesn't know why, can you help me explain it?

  • 0
    TI__Expert 8210 points

    Hi

    Below is a table that lists typical THD performance that can be achieved with UCC28056.  All of our reference designs are examples of what is possible, but like all designs performance for some parameters for these designs may vary because either it was not a target for that design or it was reduced to improve another feature.  If you have a question on a specific reference design please share the design and highlight what exactly you are asking about.

    Input Range

    (VAC)

    Load Range

    THD

    90 –  265

    100%

    <10%

    90 – 265

    50 – 100%

    < 15%*

    207 – 265

    40 – 100%

    < 10%

    * Can achieve up to <10% with significant system limitation and limit on specification

    Best Regards,

    Eric