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Original question:

BQ25710：Discharge the battery by forcing it into battery operation when VBUS power is supplied.

BQ25710: About Realization of battery only mode in the presence of AC adapter

Tsukui Yusuke
Guru 21930 points
Part Number: BQ25710


Hi,

I have a question after referring to the following E2E.
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1046833/bq25710-discharge-the-battery-by-forcing-it-into-battery-operation-when-vbus-power-is-supplied/3875199#3875199

Customer want to have the ability to measure the power of the batteries implemented in their applications.
In the background, they want to realize the battery discharge function in the presence of the AC adapter.
I introduced learn mode. However, they want to realize the discharge function with the configuration the below.



They want to install a FET on the VBUS pin and force the AC adapter to be absent.
Could you give me some advice on the problems with this configuration?

Best regards,
Yusuke



  • 0
    TI__Genius 11385 points

    Hi Yusuke-san,

    There is no problem with that. In this type of configuration, the FETs (back to back blocking FETs) can be treated as an independently controlled load switch. From the perspective of the charger, it would see no voltage at VBUS.

    Thanks and I hope this helps,

    Peng

    *Please press "This Resolved My Issue" on the thread if my answer is satisfactory