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BQ24297: Customer needs info on RBFET ,when in off state, current is being pulled thru the diode, from VBUS to PMID

Jeff Coletti
Expert 8755 points
Part Number: BQ24297

Hi Support team

My customer is using the BQ24297 in a very nonstandard ckt. In one of the modes they will be pulling current thru the RBFET(Q1) parasitic diode (fet is in offstate). This current can be up to 500mA and the ambient temp may hit 65C. Does this present a thermal issue for the part? Can this damage teh part or cause it to lock up or improper operation?

Thanks

Jeff Coletti

  • 0
    TI__Guru**** 166626 points
    Hi Jeff,

    In general, the parasitic body diode can handle the same current as the FET when it is on. However, we have not tested this particular configuration over temperature so I cannot warranty the operation.

    Regards,
    Jeff