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BQ25619: QON

ROBERT BERNERT
Prodigy 30 points
Part Number: BQ25619

I was wondering if there is an issue with using /QON pin to come out of sleep mode (PIN12 set low), leave the pin low while charging, go into sleep mode while pin 12  is low and leaving it low until it is time to wake up at which time pin 12 will be set high and then low.

  • 0
    TI__Mastermind 25800 points

    Hey Robert,

    The pin does not function the way you are describing.

    Firstly, there are two modes of operation when it comes to /QON - Reset and Ship Mode. 

    Shipping mode is whenever there is no adapter present. The BATFET is disabled via I2C bit (isolating the SYS and BAT rails), and the /QON pin can be used re-enable the BATFET. You can read more about this in section 8.3.7.1 BATFET Disable (Enter Ship Mode) and 8.3.7.2 BATFET Enable (Exit Ship Mode) of the datasheet. 

    The /QON pin can also be used to reset the system, but it only does this for brief period of time. It will not keep the charger in sleep mode. You would have to set the BATFET_DIS bit to enter Ship Mode to do this. You can refer to section 8.3.7.3 BATFET Full System Reset for more details.

    Regards,

    Joel H