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TPS53626: Operation in inaccurate pin-strapping setting

MINKYUNG KIM
Expert 1250 points
Part Number: TPS53626

Hi there,

I wonder the inaccurate value setting on the pin-strapping can cause the fatal problem on operation. The designated ICC_MAX of the rail (by INTEL) is 9.7A and R_IMAX is supposed to be 3424.76 kOhm. But the customer uses 3600 kOhm because they don't have enough registered resistor values, and thereby the ICC_MAX is set by 9.2 A. Can you explain about how the device operate in the case 1) when the ICC_MAX set value is lower than the designated rail,  2) when the ICC_MAX set value is higher than the designated rail max current? Thank you so much for your help!

  • 0
    TI__Genius 11095 points

    Hello,

    It would be better to set the ICCMAX slightly higher than the target, than slightly below. The SVID bus has an alert triggering when Iout reaches ICCMAX (under normal operation it should not reach higher than ICCMAX), and we have seen instances before when the ICCMAX alert caused CPU to fail to boot up or created a hangup (or hardware check) situation.