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TPS7H4011-SP: Equation for Input Capacitor Selection

David McLaren
Prodigy 60 points
Part Number: TPS7H4011-SP
Other Parts Discussed in Thread: TPS7H4104-SEP, , TPS7H4003-SEP

Tool/software:

I believe there's an error in Equation 18, to calculate ICINrms, in the TPS7H4011-SP datasheet. Within the square root, I think the denominator of VIN(MIN) should be squared. Please could you confirm whether this is correct? This also applies to Equation 37 in the TPS7H4104-SEP datasheet. This can be contrasted with Equation 30 in the TPS7H4003-SEP datasheet, which I think is correct.

  • 0
    TI__Expert 5081 points

    Hi David,

    Thank you for bringing this to our attention.

    I will discuss this internally with our team and get back to you tomorrow to confirm.

    Thanks,

    Andy

  • +1 in reply to Andy Fondaw
    TI__Expert 5081 points

    Hi David,

    I was able to confirm with our team that both equation 18 in the TPS7H4011-SP datasheet, and equation 37 in the TPS7H4104-SEP datasheet should take the form of equation 30 from the TPS7H4003-SEP datasheet.

    We will implement corrections in the next datasheet revisions for both devices.

    Thanks,

    Andy