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BQ2060A low power mode - how to confirm?

Alex Dolgin
Prodigy 60 points
Other Parts Discussed in Thread: BQ2060A

Is there a way to confirm (other than measuring stand by current) that the chip entered low power mode?

Thank you

  • 0
    TI__Expert 6470 points

    Alex,

    Its a very old device and experts have retired or left the company. With modern gauges, you can do this by scoping the thermistor signal, which changes characteristics significantly when low power (sleep) mode is entered. I honestly don't know if that works on the bq2060A and I doubt we can determine it just from the data sheet. If it sounds like something you could use, we could check it out for you.

    Regards,

    Doug

  • 0 in reply to Doug Williams4811
    Prodigy 60 points

    Doug, thank you for your help. I meant how to verify that the pack is actually in sleep mode after sending the sleep command to a closed pack. We have no physical access to the production pack PCB; is there some kind of acknowlegement sent back from the chip after it went to sleep, or other indirect way to know by monitoring the SMBUS?

  • 0 in reply to Alex Dolgin
    TI__Genius 10235 points

    Alex,

    The method Doug mentioned is really the only way to check if the device is in sleep mode on a sealed pack. Unfortunately, there is no way to verify that the part went to sleep through SMBus, as any communication on the bus will immediately wake the device back up.