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UCD9248: UCD9248 current sense calibration

Intellectual 285 points

Replies: 3

Views: 87

Part Number: UCD9248

The current sensing calibration parameter includes gain and offset. Are these value calibrated and set in default from factory or it should be set by ourselfves? Are these values automatically calculated and set by the power management designer software? I think each UCD9248 may be different and should have independent  calibration value. Do I need to calibrate each UCD9248 on my board and set different value? If it is true, I think it is difficult for product production. 

I have 3 boards of the same design, current sensing result is different in an extent of  50%. This is why I ask this question.

  • Hi Maverick, 

    We will check and reply to you. 

    Thanks

    Qian

  • In reply to Qian Chen:

    Hi Maverick,

    The IOUT_CAL_GAIN should match the current sense gain of power stage. 

    Usually IOUT_CAL_OFFSET is not needed if the current sense accuracy looks fine. 

    Thanks

    Qian

  • In reply to Qian Chen:

    Hi Maverick, 

    We don't hear from you for some time.

    Please let us know if you need further support. 

    Thanks

    Qian