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130V Vin buck solution

David Woo
Prodigy 530 points

Our customer needs a buck solution with the following spec?

Vin = 130V and Vo = 30V at 20-30A. Any suggestion?

  • 0
    TI__Intellectual 1435 points

    David,

    That seems like too much power (900W maximum output)  for buck topology and the voltage range is not a good fit for the half-bridge gate driver IC's used in dc-dc applications.  I would start with AC/DC solution and remove the input recitifer bridge and  isolated feedback (opto-coupler).   You might ask the question on an AC/DC forum where 130V could represent the rectified AC input.

    The full-bridge topology is commonly used  for power supplies in the 1KW range.  TI offers controllers in the UCC and LM5K families for full bridge and phase shift full-bridge.   The gate driver to the high side switches could be implemented with gate drive transformers to level shift the drive signal  to 130V.