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BQ25170J: Inquiry Regarding Battery Management Using BQ25170 and BQ27220

kyosik sim
Prodigy 10 points
Part Number: BQ25170J
Other Parts Discussed in Thread: BQ25170, BQ27220

Tool/software:

I am working on a battery management design using the BQ25170 and BQ27220 for charging and monitoring a lithium-polymer battery.

During the charging process, I would like to confirm whether there would be any issues if the charging current is modified by adjusting the ISAT resistor value through control of the Q1 switch,

based on battery temperature and status feedback from the BQ27220 (as shown in the attached schematic).

In addition, in the event of a charging fault, I have implemented a shutdown function using the Q2 switch to stop battery charging. Could you please advise if this approach is acceptable?

Thank you for your support, and I look forward to your guidance.

  • 0
    TI__Guru* 75906 points

    Hello

    kyosik sim said:
    During the charging process, I would like to confirm whether there would be any issues if the charging current is modified by adjusting the ISAT resistor value through control of the Q1 switch,

    Yes-This has been used before and should work without problems.

    kyosik sim said:
    In addition, in the event of a charging fault, I have implemented a shutdown function using the Q2 switch to stop battery charging. Could you please advise if this approach is acceptable?

    Yes -- This has also been used before and will reset the unit clearing fault.