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TPS40422: Can i use it's default without PMBUS programming to achieve 12Vin, 0.8Vout 50 A two-phase single-output mode?

PYTsai
Genius 9285 points
Part Number: TPS40422
Other Parts Discussed in Thread: TPS40322, TPS40428

HI 

Can i use TPS40422's default setting and not do PMBUS programming to achieve 12Vin, 0.8Vout 50 A two-phase single-output mode?

Thanks!

PY Tsai

  • 0
    TI__Mastermind 24075 points
    hi PY,

    The default OC per phase is 30A which may be too low for 50A design (phase current is 25A)
    Also, the IOUT_CAL_GAIN in PMBus should match actual inductor DCR value for make OC threshold correct.

    If customer does not need PMBus, they can consider TPS40322.
    Another option is TPS40428+CSD95378B. I think TPS40428 default setting can be used for customer's design.

    Thanks
    Qian