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BQ76930: Entering into SHIP mode, when TS1 pin is pulled up

Heetae Yang
Prodigy 10 points
Part Number: BQ76930

Hi, friends

When BQ76930's entering SHIP mode by i2c, if the TS1 pin was pulled up and will continue to be pulled up to 4.7 volts, The AFE will maintain NORMAL mode?
Or it will be switched to SHIP mode and then return to NORMAL mode?
Will this situation be a problem?
For reference, I won't use the temperature measurement function.
I hope your help
Thanks.
  • 0
    TI__Guru 54715 points

    Hi Heetae,

    TS1 high does not prevent the BQ76930 from going into ship mode. Boot requires a rising edge. If the signal is pulled up during ship mode it may be difficult to apply the rising edge to re-start the system.

    ABS MAX voltage for the TS1 pin after boot is 3.6V.  Higher voltage is permitted at boot.  Even if you do not use the thermistor measurement the pull up network to 4.7V should limit the voltage at the pin to 3.6V or below to avoid leakage to internal ciruitry. 

    Also note a pull down is needed on TS2 to the VC5X voltage for proper operation.