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BQ27426: Can we put the current sense resistor at PACK- side?

Howard Zou
Genius 12365 points
Part Number: BQ27426

Hi,

Can we put the current sense resistor at PACK- side?

I think that it will lead to voltage sense error since PACK- is not the same voltage as VSS of BQ27426.

But I'm not sure how large the influence is. Will the device still work?

  • 0
    TI__Guru* 76230 points

    Howard,

    The chip wasn't characterized to be used that way. Is there any reason you want the sense on the low side? 

    Even though the sense pins looks at the differential voltage and having it on the low side might work, i would not recommend that given we haven't characterized that operation

    thanks

    Onyx