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BQ25606: Is it possible to charge and supply to SYS at the same time?

Kai Sato
Intellectual 2150 points
Part Number: BQ25606

Is it possible to charge and supply to SYS at the same time?

Hi team,

I have questions about BQ25606 so could you help following questions?

Is it possible to charge and supply to SYS at the same time?
I am concerned about SYS voltage swing when SYS current suddenly changes.

Regards,
Kai

  • 0
    TI__Genius 11850 points

    Hi Kai,

    Yes, the BQ25606 can power the system and charge the battery at the same time.

    The system is prioritized over the battery, so if the BQ25606 enters VINDPM or IINDPM, then the charge current will be reduced. If the charge current ever becomes negative, this indicates that the battery has entered supplement mode and is now discharging in order to help power the system (please see Section 8.3.6.8 in the datasheet for more details on this).

    Regarding the VSYS voltage swing in case of an ISYS load transient, I would recommend ordering a BQ25606 EVM so you can evaluate the behavior under these conditions. Alternatively, if you send me your test conditions, then I can test this on an EVM myself and let you know the results.

    Best regards,

    Angelo