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Leakage of electricity was found in BQ25895M on our MOUSE

user6149206
Prodigy 10 points
Part Number: BQ25895M

1.Issue:  Leakage of electricity was found in BQ25895M on our MOUSE。

2.Question describtion: After the mouse is charged, the product has no function when the USB cable is unplugged.

3.Analyses:  When PSW switch is in off mode. Then measure the voltage(Detal please refer to below application circuit). 

                    <1>.That VBUS is 3.2V.normal is low level 0V.

                    <2>.Vin is 2.85V.

                    <3>.Vbat and Vout is 3.75V

                    <4>.USB_dect is 2.15V

4.Result: According The above analysis. Conclusion is That the VBUS 3.2V voltage is leakage from Pin1 pin of BQ25895M to VBUS.

5.Below is the application circuit.

  • 0
    TI__Guru 57541 points

    Hi,

    1. Could you please help us to the test conditions such as VBUS, VBAT, IBAT, VSYS, ISYS when the behavior happens? Are you referring to battery only operation? Is OTG (boost) mode enabled?

    2. What are all the register values when the behavior happens?

    Thanks,

    Ning.