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Battery Charger and Gauging Pairing

Poh Leong Ng
Intellectual 745 points
Other Parts Discussed in Thread: BQ24074, BQ27510

Hi All,

If I used bq24074 as my charging IC, can I still use bq27510 for my battery guage IC? The datasheet mentions that SYSOFF is needed to measure OCV of the battery. Is there other implementation if my charging IC has no SYSOFF pin?

Poh Leong

  • 0
    TI__Guru 56650 points

    I think the answer is no because the bq27510 have to use SYSOFF to discharge battery. So, bq27510 can learn a battery capacity through a full charge cycle. 

    I will move this post to gas gauge forum and hope you can get more clear answer from there.

    The question is: The bq27510 datasheet mentions that SYSOFF is needed to measure OCV of the battery. Is there other bq27510 implementation if my charging IC has no SYSOFF pin?

  • 0 in reply to Wang5577
    Intellectual 745 points

    Hi Wang,

    Thanks for the info.

    In this case, does that means if I want to use battery gauging, I would have very limited choice of battery chargers?