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BQ24103: BQ24103 when battery charge full the LED flash

Star Xu
Genius 9645 points
Part Number: BQ24103

HI

when battery charge full the battery over charged and the LED become flash.

Attached BQ24103 schematic and BAT waveform.

Please help check.

Thanks

Star

  • 0
    TI__Guru**** 151535 points

    Hi Star,

    CELLS is high so I assume this is a 2-cell battery wanting to be charged to 8.4V.  The charger regulates to that voltage based on the voltage at its BAT pin.  Is the waveform on the screen that voltage or is it measured closer to the battery?   If measured at BAT it appears that the charger is attempting to detect whether or not a battery is connected as explained in 8.3.16 Battery Detection.  Is it possible that the connection from BAT to the battery pack is so resistive that the Iwake current is enough to create a voltage drop that takes the partially charged battery up to 8.4V? 

    Regards,

    Jeff 

  • 0 in reply to Jeff F
    TI__Guru**** 151535 points

    Hi Star,

    Just following up.  Any progress?

    Regards,

    Jeff

  • 0 in reply to Jeff F
    TI__Guru**** 151535 points

    Hi,

    Since I haven't from you, I assume that you have resolved your issue and will be closing the thread.  If you have more questions, please submit a new post.

    Regards,

    Jeff