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DC/DC Design Recommendations with a Vin of 32 to 48 VDC and Vout of 12VDC @250A (3 kw)

David Kaplin
Prodigy 10 points
Other Parts Discussed in Thread: LM5046, UCC28950

As the subject line states we are looking for some recommendations for a high power DC/DC converter with the following parameters:

Vin: 32 – 48 VDC

Vout: 12 VDC

Iout: 250 A

 

The application this is to be designed for has a maximum up time around 10 minutes, and will be shutdown for the majority of the time.  We are looking at doing a multiple phase design due to the high current requirement but can’t seem to find any TI products that fit our needs.  In case we missed something I wanted to post on here for feedback.

 

Thanks!

Dave Kaplin

 

 

  • TI__Mastermind 34465 points
    The LM5046 is a phase shift full bridge (PSFB) controller that was designed for high power applications to directly drive the input voltages in your application. However I have not seen a multi phase reference design.
    Also you could consider using the UCC28950.
    This has a SYNC pin with multi phase capability. However it was designed for a higher voltage input and it will require gate drive transformers.
    Regards,
    John Griffin