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BQ25703A: bq25703A / Connect IADPT, IBAT and PSYS

S.Satoshi
Guru 21685 points
Part Number: BQ25703A

Hi,

I know that we can see buffered voltage or current via  IADPT, IBAT and PSYS, then can we connect these pins to reduce GPIO line from MCU?

Best Regards,

Satoshi / Japan Disty

  • 0
    TI__Guru 56650 points

    The datasheet gives the IADPT, IBAT current capability spec: 1mA. PSYS can be set to 1uA/W. Please compare them to you GPIO port or MCU ADC input pin leakage current. And then, you can know it can be connected to those pins or not.

    How about read them out from bq25703A ADC register?

    BTW, in light load, converter runs in PFM to keep higher frequency. In PFM, the IADPT, IBAT and PSYS may show more ripple. You may want to add a filter on those pins if you want to use them in light load.

  • 0 in reply to Wang5577
    Guru 21685 points

    Hi Wang,

    They just want to know how to use these pins. Does you mean that they can connect these pins if MCU can accept their current capability? They are considering to use as attached.

    Best Regard,

    Satoshi

  • 0 in reply to S.Satoshi
    TI__Guru 56650 points
    No. They cannot connect them together.