This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ25798BKUPEVM: VSYS shortage

Part Number: BQ25798BKUPEVM

Dear TI,

I hope that you are doing well. I have shortened the VSYS point as it was loaded at 1A and charger was charging the battery at 1.5A. I changed the resistor of ILIM_HiZ pin from 127k ohm to 27.4k ohm.
I did the shortage on purpose to capture the transient but the charger is not charging the battery as the EVM gets resumed. The register status is showing that the charger is in Fast Charge(CC) mode.
Please help.

I am looking forward to the solution for it.

Regards,

Ahmed Ali

  • Hi Ahmed,

    If the register reports fast charge but no VINDPM, IINDPM, thermal reg or TS fault then the IC is likely damaged.  If your transient short caused the SYS pin to go 0.3V below ground or above 20V on release, the BATFET is likely damaged.  

    Regards,

    Jeff