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How to calibrate bq27541?

ming xin
Prodigy 105 points
Other Parts Discussed in Thread: BQ27541, BQ27350, BQ27541-V200

hi everyone:

     i want to calibrate bq27541,but i don't know the detail.

1、cc board offset calibration

       Is it set the control_status bit2 BCA?

2、How to achieve cc offset calibrate,voltage calibration,temprature calibration,pack current calibration.is it sent CAL_mode? where actual voltage ,actual temprature,actual pack current is send?

3、when it is to set control_status bit2 CCA.

    Thanks

  • 0 in reply to ming xin
    Prodigy 105 points

    Hi David,

    Thank you for your reply.

    The calibration code is very useful to me,I have a few places do not quite understand,

    I hope you can give answer. Please find attached

    We are developing a kind of battery test equipment to test the battery parameters, to calibrate V/I/T, so we can’t calibrate with your software instead of writing our own.

    In addition how to open DFI file and alter the file.

    My English is poor, hope you can understand what I mean expression.

          Best Regards,

         Lily_ming

  • 0 in reply to ming xin
    TI__Genius 14985 points

    Most customers use TI's software for calibration on samples to create the golden file, then they don't need to do calibration in production.  However, the best reference for calibration modes is an app note for our first single-cell IT gauge, the bq27350:

    http://focus.ti.com/lit/an/slua415/slua415.pdf

    That product did require calibration on every board during production.  The methods still apply to the newer products like bq27541, but are not typically necessary.

    Also, you can search the E2E forums for other posts about calibration mode.  If I can find them I'll post them here.

  • 0 in reply to dMax
    Intellectual 470 points
    Hi DMax,
    Does the command used to calibrate BQ27350 the same with BQ27541-V200?

    I cannot find any document reference for BQ27541, can i use the SLUA415 calibration steps for BQ27541?