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BQ25618: QON_L with VBUS still powered

Part Number: BQ25618
Other Parts Discussed in Thread: BQ25600

We want to use a timed button input to the QON_L input on the BQ25618/BQ25600 in order to initiate a hard reset.

From my understanding - if we get a QON_L signal on the charger, it will disconnect VBAT from VSYS.  We intend the user to do this with VBUS attached - so there is still a power path from VBUS to PMID and to VSYS.  What happens in this case?  The datasheet wasn't too clear on this particular scenario and any input would be appreciated.

  • Hello Nick,

    If you are referring to the functionality in section 8.3.7.3 BATFET Full System Reset of the datasheet, you will need to enable the BATFET_RST_VBUS. Then when VBUS is attached the charger will enter HIZ mode before toggling the BATFET.

    Sincerely,

    Wyatt Keller