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BOOSTXL-DRV8323RS: I need few parameters value but not able to get it from Data sheet

Hemil Kothari
Prodigy 20 points
Part Number: BOOSTXL-DRV8323RS


I_trip - %Amps // Max current for trip
Rshunt 
ADCGain - % // ADC Gain factor scaled by SPI
ISenseVoltPerAmp
I need help in getting values of these constants for BoostXL-DRV8323RS
  • 0
    TI__Genius 14450 points

    Hi Hemil,

    Thank you for posting to the Motor Driver's forum!

    Hemil Kothari said:
    I_trip

    Please correct me if I am wrong, but I assume that this is referring to the VDS overcurrent trip voltage which depends on what you have this setting set to. The image below highlights the possible VDS trip voltages you can select via SPI.

    Hemil Kothari said:
    Rshunt

    This value can be found in the BOOSTXL-DRV8323RS schematic.

    Hemil Kothari said:
    ADCGain

    As with the VDS overcurrent trip voltage, your CSA Gain (which is what I believe this may be referring to) is dependent on you SPI register setting, please see image below:

    Hemil Kothari said:
    ISenseVoltPerAmp

    I am not exactly sure what this is referring to, can you please clarify?

    Best,

    ~Alicia

  • 0 in reply to Alicia Rosenberger
    Prodigy 20 points

    Hi Alicia, 

    Thanks for the response.

    I am doing parameter estimation of motor using MATLAB simulink blocks. There I need information about BoostXL-DRV8323RS. 

    I have a sample file of correct data for BoostXL-DRV8305. I need same values for DRV8323RS

  • 0 in reply to Hemil Kothari
    TI__Genius 14450 points

    Hi Hemil,

    Based on these code snippets, I assume that ISenseVoltPerAmp is referring to the the output voltage of SOx which can be found in the "CURRENT SENSE AMPLIFIER (SNx, SOx, SPx, VREF)" section of the Electrical Characteristics in the datasheet.

    Best,

    ~Alicia