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TPS53681: mutiphase trade off for high and low phases

Bonnie Chen
Intellectual 1150 points
Part Number: TPS53681

Hi team,

i'm wondering what's the pro and cons for high phases and low phases?

also, what's the switching bar for this inductor value?

if we take 12Vin/400A/1Vout for example with 8 phase and 12phase?

  • 0
    TI__Mastermind 24075 points

    Hi Bonnie, 

    More phases results in higher BOM cost and larger PCB area, but it has better efficiency, thermal, load transient performance. 

    I will ask team to comment if how much phases are needed for 400A load. 

    Thanks

    Qian

  • 0 in reply to Qian Chen
    TI__Intellectual 1790 points

    Hi Bonnie,

    Would you please provide details to propose Number of phases for 1V/400A applications.

    •  is 400A TDP current or Max current? if it is maximum, please provide average/TDP current.
    • what is the Ambient temperature and airflow
    • Allowable temperature rise in board.

    Thanks.

    Regards,

    Rama.