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600v dc to 12v dc solutions

subrat nayak72
Expert 1285 points
Other Parts Discussed in Thread: UCC28881, UC1856

I need a dc-dc converter that can take 600v dc input and provide 12v dc output at 1A-5A max. Is there a solution anyone can suggest? Either a switching regulator or controller IC to design my own or a dc-dc ready made module that can do the job? Ideally it should also be isolated but I could work with non-isolated version too. 

  • 0
    TI__Mastermind 31580 points
    Hi Subrat,

    At that power level would you consider an non-isolated flyback with a PSR controller such as UCCC28700?

    TI has switcher solutions for buck topology such as UCC28881 but these run out at 4.5W power level.

    Regards

    Peter
  • 0
    TI__Expert 4015 points
    Hi Subrat, you're simplest options are probably a forward (either a standard forward or two switch forward) or a cascode flyback. Any of these can be isolated as they use a transformer. They will all need two switches though because of the high input voltage ( or one very high voltage FET ).

    www.ti.com/.../tidu412a.pdf - Shows a cascode flyback
    www.ti.com/.../PMP7413 - Shows an active clamp forward, but for 400V input

    Another option depending on the input voltage variation would be to use an LLC, see www.ti.com/.../UCC25600 or use a standard half bridge controller such as the UC1856.

    Hope this helps.
    Thanks
    Billy