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UCC28610: flyback solution for negative input

Charles Zhang1
Intellectual 3000 points
Part Number: UCC28610

Hi Team,

Is there any Flyback solution applicable for negative input? The negative input will up to -72Vdc.

Regards,

  • 0
    TI__Mastermind 44330 points

    Hi Charles,

    I am not sure what power you need to support nor whether the output is positive or negative,  but I did find the PMP20580 reference design that supports a -72V input. 

    Are you looking for something like this?

    Regards,

  • 0 in reply to JCHK
    TI__Intellectual 3000 points

    Hi JCHK,

    Thanks for your reply, the PSU output will be 12V/100W.

    I have known PMP20580, now I am wondering if Flyback topology is also applicable for negative input application.

    Regards,  

  • 0 in reply to Charles Zhang1
    TI__Mastermind 44330 points

    Hi Charles,

    Since a flyback supply uses a transformer, there is no reason it can't work from a negative input rail as long as the controller GND is the most negative potential and the absolute maximum ratings of the controller are not violated.  Unfortunately in webench or with our models, this may not simulate well as the models assume the lowest potential is GND. It might be best to get an EVM to try it out.