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BQ25756: BQ25756 change to system load node

Ben
Intellectual 400 points
Part Number: BQ25756

Tool/software:

Hello TI team,

Is it acceptable to change the system load node as follows?

 -- > 

Because, I want to know battery current exactly without system load current, also control to charge current, only considering battery.

If I supply input power enough, does it possible?

Thank you.

  • +1
    TI__Mastermind 31976 points

    Hello Ben,

    Ben said:
    Is it acceptable to change the system load node as follows?

    No, This is not recommend. The BQ25756 uses the current sensed acrossthe RBAT_SNS to measure the inductor current to calculate the DCR of the inductor. If you apply a load on the other side of the sense resistor, the RBAT_SNS will not be able to measure the correct inductor current and the system could be come unstable.

    Best Regards,

    Christian.