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DRV8889-Q1: Output current accuracy calculation

zhiyuan zhang
Intellectual 620 points
Part Number: DRV8889-Q1

Hello expert,

    I find the Ifs formula in datasheet 7.3.5 current regulation, and how to calculate the current accuracy?

    For the TRQ_DAC accuracy, should we refer to the accuracy below?  

    And the device just regulate the peak current, so how to calculate the average current?

  • 0
    TI__Mastermind 23431 points

    Hey Zhang,

    The accuracy is given in Current Trip Accuracy below depending on where in the electrical sine-wave cycle the signal is. 

    For the current regulation, use the below formula:

    zhiyuan zhang said:
    For the TRQ_DAC accuracy, should we refer to the accuracy below?  

    Yes, use the ITRIP accuracy since that is the output accuracy, TRQ_DAC is an internal scalar.  

    Best,

    Jacob