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BQ25792: Two ACFETs and watchdog questions

Part Number: BQ25792

Hi Team,

Two question here.

1. For two ACFETs structure, I would like to check if my understanding is correct or not. If second input(VAC2) is presented before 1st input(VAC1), the BQ25792 will use second input(VAC2)  as power input even if 1st input(VAC1) is presented, is it correct? If we want to switch, we can use EN_ACDRV to switch power input from VAC2 to VAC1. But we need to disable the EN_ACDRV2 and then enable EN_ACDRV1, is it correct?

2. I'm not sure if we need to issue some specific bit for watchdog to avoid let the BQ25792 reset to original setting because I see a lot of watchdog setting in the register map.


Regards,

Roy

  • HI Roy,

    Regarding 1, correct.

    Regarding 2, the host software must write to the watchdog bit (REG0x10[3]) before the watchdog timer (REG0x10[2:0]) expires.  Otherwise, many register reset to default values.

    Regards,

    Jeff