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BQ24765: BQ

Dennis Kindschuh
Prodigy 180 points
Part Number: BQ24765

When using the 24765 to control the charge of a LION battery, how would the host typically differentiate between a fully charged battery and a battery disconnect?

  • 0
    TI__Guru*** 147725 points
    Hi Dennis,

    The BQ24765 does not perform termination and so cannot detect when a battery has been removed. It relies on the host and/or a gas gauge IC to perform termination and to determine when the battery has been removed.
  • 0 in reply to Jeff F
    Prodigy 180 points

    Thanks Jefff F.  I am aware of your explanation.  That's precisely why I asked the community about it. I was simply curious how others have handled the situation.  I currently have a large resistance pullup on the battery positive and watch for a rise in voltage when the battery is removed.  

  • 0 in reply to Dennis Kindschuh
    TI__Expert 5330 points
    Hello Dennis,

    I am going to go ahead and close this thread. As previously discussed, our recommendation would be to use a gas gauge IC. My only concern with the pull-up resistor approach you have suggested is that I don't know if the leakage through your pullup resistor is going to cause a reduction in battery life if applied to a fully charged battery over a significant time. It would depend on the current and time applied. As long as this is not an issue, your approach seems reasonable.

    Thanks,
    Steve