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bq27410 calibration necessity

David McRell
Intellectual 445 points

How much improvement are we expected to get from a calibrated part, compared to a non-calibrated part into which we simply load the battery size in mAh?

Thanks,

David

  • 0
    TI__Expert 7250 points

    Hi David,

    It is not necessary to calibrate the bq27410 voltage or current.  Voltage is trimmed in assembly test procedure at TI.  Current calibration is not necessary because any amount of current the gauge is “off by” will be for example, added in during charge and the same amount subtracted out during discharge.

    What you should program during production is the battery are all of the dataflash configuration values including:
    Board Offset (should be calibrated on 20 boards & take the average)
    Design Capacity / Energy
    Taper Current / Voltage
    Op config
    R_a0 and R_a0x tables ( you should make both tables the same based on the values the gauge learned during cycling).

    Best regards, Keith