• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 1163 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC2897A: Can UCC2897A generate 12V/42A output form 48V

Bryan Lai
Prodigy 20 points
Part Number: UCC2897A
Other Parts Discussed in Thread: PMP9656

UCC2897AEVM, 48V-60VDC Input, 12V/250W Active Clamp Forward Reference Design, 12V/21A output from 54V DC input.

Can the design reach 12V/500W? If not, what is the limitation?  Thanks.

  • 0
    TI__Mastermind 27145 points
    Hi Bryan,

    Thanks for your interest in PMP9656. The PMP9656 power stage was not designed to handle 12V/500W. For example, the transformer is only rated for 250W and the output inductor is rated to a maximum DC current of 27A.

    At 12V/500W it could be difficult finding off the shelf magnetics which can handle the high current. You could consider doing an interleaved active clamp forward or possibly a half bridge. Take a look at PMP2214. Also take a look at this application note on interleaved active clamp forward: www.ti.com/.../slyt501.pdf

    Best Regards,
    Ben Lough
  • 0 in reply to Benjamin Lough
    Prodigy 20 points

    Hi Ben,

    Thanks so much for the feedback. So for single end solution case, the bottleneck  is transformer rating. I am just curious that I find the pulse have a new planar transformer that could deliver 500W.

    Could it be feasible to deliver 12V/40A with that theoretically. Or is there  other thing need to be considered. Thanks

    End of doc. PH10xxCNL

    www.pulseelectronics.com/.../G046.pdf

  • 0 in reply to Bryan Lai
    TI__Mastermind 27145 points

    Hi Bryan,

    In theory, yes you could use this transformer for 12V/40A. One thing to keep in mind is that it may be difficult finding an off the shelf output inductor that is rated >30A. The output inductor may need to be a custom design.

    I would also encourage you to walk through this design guide for active clamp forward. . This will help you design the rest of the power stage.

    Best Regards,

    Ben Lough