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bq27541 calculation

J.C Chen
Expert 1285 points
Other Parts Discussed in Thread: BQ27541-V200

HI

    i use the bq27541-v200 as a gas gauge in a application of 2S1P, but some packs' voltage can't be calibrated.   Who has met the same question? 3757.Portable Printer 2S1P_V1.01.pdf

  Best regards

Jason chen

  • 0
    TI__Genius 14985 points

    Jason,

    Did you check the voltage at the BAT pin and is it being divided correctly?

    By the way, we recommend the industrial rated version of the op-amp because your voltage divider output will be much more stable and accurate across a wider temperature range if you use it.

  • 0 in reply to dMax
    Expert 1285 points

    Hi

    1)The voltage is divided correctly.

    2)Can you send me a specification about the op-amp?  Using a op-amp to comprise the voltage divider, Is there any methode to prevent the output voltage from oscillation.  Now the coupling capacitance is far away from the op-amp. I add another capacitance on the op-amp basepin. Then the output voltage is stable...

    Best regards.