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BQ25882: power path

Kuo Kwan CHAN
Prodigy 100 points
Part Number: BQ25882

Hello,

The BQ25882 is a battery charge controller with power path. In the case we connect a proper power supply on VBUS pin (eg 5VDC) & there is no battery connected on BAT. Does the internal boost converter works? What is the voltage on the SYS pin? Is the IC is able to power supply the system with just DC source connected on VBUS?

I have a 2nd question when BQ25882 is in stand alone mode without any connection to an host. When a battery is connected to the device and /CE pin is low and valid power supply is applied on VBUS, does the battery charge starts automatically without any commands transmitted via I²C.

Kind Regards

Kuo Kwan

  • 0
    TI__Genius 16185 points

    Hello,

    For no battery condition, the default system voltage will regulate on 7V output. And it is ok to provide system loading without battery.

    This part should be controlled by I2C interface but it also works in default mode without host controlled. below table is BQ25882's default mode.

    BTW, what kind of application you design? And you can contact with me by paulyeh@ti.com

  • 0
    Prodigy 100 points
    Hello,

    I'm working on a handheld device for medical application.

    Best Regards