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BQ24195: When OTG=low, can PMID go to 0V?

David Park
Expert 6700 points
Part Number: BQ24195

Hi,

When OTG=low, can PMID go to 0V?

Now it is 3.4V output at OTG=low.

Is there any solution for above requirement?

Thanks.

  • 0
    TI__Intellectual 960 points
    Hi David,

    I'm not sure I understand your question: while in charging mode, the PMID pin should have the same voltage as the VBUS input, as these two pins are connected with a MOSFET and the body diode flows in this direction. There is no way to turn off this voltage as PMID is the input to the buck converter used for charging.

    If you see this voltage when charging is disabled, please answer the following questions:

    1. What size capacitor do you have for the bootstrap capacitor?
    2. Do you have a resistor in series with this capacitor?
    3. What is the capacitance on your PMID and VBUS pins?

    Thanks!

    Parker