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Original question:

BQ20Z90: BQ20Z90 charger MOS turn off when SOC = 99%

BQ20Z90: BQ20Z90 cold temp protection setting

Jason Shen
Intellectual 1965 points
Part Number: BQ20Z90

Dear team,

we have a test with a battery pack which is designed with BQ20Z90, find the pack will turn off under zero degree, and turn off with 13 degree.

so we are wondering if our device can set the cold temp protection point though the interface? we do not find it in the GUI or the Tech manual.

thanks

Jun Shen

  • 0
    TI__Mastermind 42535 points
    Jun,

    By turn off do you mean that the FET turns off at zero or 13C? The gauge is not supposed to turn off the FETs under UT conditions. If the capacity drops to 0 at 0C, that means the chemistry of the device is not optimized for 0C.