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BQ35100: BQ35100 calibration

John Liu59
Intellectual 2735 points
Part Number: BQ35100
Other Parts Discussed in Thread: BQSTUDIO

Dear,

In real application of BQ35100, will calibration is a must step?

What is the purpose of calibration?

In production, how to implement the calibration step if it is a must?

Thanks.

  • 0
    TI__Guru* 76230 points

    Hi John,

    Calibration is to ensure the accuracy of the voltage temperature and current measurement. If you are unable  to calibrate each, then you can take the average calibration value of about 20 units and program on a  golden file which you will use for mass production.

    pls see app note below to help guide the production process. Though written for a different device, is identical  for this

    thanks

    Onyx

  • 0 in reply to Onyx Ahiakwo
    TI__Intellectual 2735 points

    Hi Onyx,

    From the documents, before calibration, we need write the data flash image to each device, for BQ35100, could you please help advice how to write the data flash image? what file should be required and how to get the file to write?

    Thanks.

  • 0 in reply to John Liu59
    TI__Intellectual 2735 points

    Hi Onyx,

    For the data flash image file, could you please help check below questions:

    1. What is contained in the data flash image file? Do we need to write the data flash image to BQ35100 before calibration?

    2. What files is required to write to thee data flash image, how to get the file using BQ studio?

    3. If the data flash image is not wrote, can BQ35100 start work?

    Thanks.

  • 0 in reply to John Liu59
    TI__Guru* 76230 points

    Hi 

    Use the golden image tab of bqstudio to extract the flashstream file which is the golden file for mass production. The dffs contains just the data flash settings. The bqfs contains both the instruction flash (firmware) and the data flash. You use the bqfs if you have chips that have a different firmware version other than the default.

    You have to program the golden image which contains your settings, chem id et al for the gauge to work proprely

    thanks

    Onyx

  • 0 in reply to Onyx Ahiakwo
    TI__Intellectual 2735 points

    Hi  Onyx,

    Thanks for you confirmation.

    So the bqfs file can be wrote to BQ35100 by host during startup?

    Thanks.

  • 0 in reply to John Liu59
    TI__Guru* 76230 points

    yes it can. It is a one time effort that needs to be done

    thanks

    Onyx