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UCC29910A: UCC29910A

Moha ABA
Prodigy 90 points

Part Number: UCC29910A

Hi, 

I would like to design a PFC converter in buck configuration.

I found the UCC29910A, and I would like to know if can I use it with an input frequency range goes from 400Hz to 800Hz Vin=115VAC ? 

Thank you for your reply.

A+

  • 0
    TI__Genius 11350 points

    I don't see a reason that you cannot use UCC29910A with the higher input frequency.  That said, it was intended to work at 50-60Hz line and I'm not aware of anyone who has used it in this higher frequency range.

  • 0 in reply to Ray DiCecco
    Prodigy 90 points

    Hello,

    Thank you for your reply.

    The reason that I asked this question, is that I should meet harmonic distortion requirement. When I saw the UCC299910A user guide, I found that the input current is not in phase with the input voltage and does not look like a pure sinus especially when current goes to zero. 

    I don't know if there is some simulars TI chips that can be used on PFC BUCK configuration with high input frenquency range. 

    Best regards,

  • 0 in reply to Moha ABA
    TI__Genius 11350 points

    Hi, the crossover distortion is an inherent issue with buck PFC which occurs when Vout falls below Vin (see p10 & p11 in the datasheet).  I don't know the details of your application but you may find the following app note useful: https://www.ti.com/seclit/ml/slup264/slup264.pdf

    Most customers find it more practical to use a boost PFC and down-regulating in a second stage to achieve maximum PF and efficiency.  I urge you to search TI's reference design database: https://www.ti.com/reference-designs/ .  Here's just one example using a PFC paired with and LLC have bridge to achieve 42V/6A out with 92% efficiency and very high power factor: https://www.ti.com/tool/PMP5327