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Looking for a suitable multiphase buck controller.

ROGER FECTEAU
Prodigy 20 points
Other Parts Discussed in Thread: UCC28C40, TPS53667

I am looking for a somewhat general purpose multiphase buck controller capable of 6 or more phase control.  The application is high power high voltage step down (~400V to 100-300V).  Any suggestions?

  • 0
    TI__Mastermind 18370 points
    An expert will get back to you soon.
  • 0 in reply to Yitzhak Bolurian
    TI__Mastermind 34465 points

    Hello Roger,

    You should consider using the UCC28C40 family of parts in an interleaved application.
    You will require 6 buck stages with each  stage controlled by a separate UCC28C40.
    The oscillator on each of the controllers should be synchronized to a master clock that runs at whichever frequency you require.

    For a 6 phase system you will require the synchronization pulses to be 60 degrees out of phase with each other.

    Unfortunately TI does not have a reference design that utilizes this part in a multiphase application and the above information is a proposed solution only.

    Hope this is enough information to answer your question.

    Regards

    John

  • 0 in reply to John Griffin1
    Prodigy 20 points

    sc4201.pdfHi John,

    Thank you for your prompt reply.

    Yes I have considered such a solution although not with the UCC28C40.  This solution would work well with the Semtech SC4201 (datasheet attached).  Unfortunately that part is now obsolete.  I am currently considering the TPS53667.  Although it is has a lot of functionality I don't need, it does have a means of current sharing that I need and hope to take advantage of with a little creative circuitry.

    Thank you,

    Roger