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BQ24610 Status Pins

John Cooper14
Intellectual 330 points
Other Parts Discussed in Thread: BQ24610

We are trying to use the status pins on BQ24610 to determine if the battery is charging. However, we seem to get different results then what table 2 in the datasheet would make us think. For example, when the battery is charging then we get stat 1= off and stat 2= on, which is opposite of what the table tells us. I have confirmed with a multi-meter this result and I also reconfirmed the pin-out to be correct.

Thanks,

John

  • 0
    Intellectual 330 points
    Is there any update on this?

    Thanks,
    John
  • 0 in reply to John Cooper14
    TI__Genius 11480 points
    Hi John,

    Sorry for the delay. So when the battery is charging, stat 1 is pulled low (~0 V), and stat 2 is high (~3.3 is volts), correct?

    That is the correct case. if you look at the system diagram, the stat pins are connected to an open drain transistor. This is done to use active low logic, which let's us turn on an LED when that pin is "true".

    For example, if a battery is in the charging state, stat 2 = 3.3 V, a stat 2 indicator LED biased by Vref would be off. Stat 1 would = 0 V, allowing the STAT 1 LED to be turned on.

    It sounds like you may be expecting the stat pins to be used as active high logic to drive the LEDs. This would give you the results you are experiencing.