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Motor drivers forum

JH Park
Prodigy 20 points
Part Number: DRV8353RS-EVM

Hi,


I am designing a motor driver using the DRV8353-EVM schematic as a reference.
I'm unsure about the purpose of the circuits highlighted with red squares in the schematic below.
Are these circuits essential? Please explain the function of each highlighted circuit.

  • 0
    TI__Genius 12231 points

    Hi JH, 

    Thank you for your question.  Allow me to follow-up with a clarification on these circuits, as they are indeed optional but useful. 

    Best Regards, 

    -Joshua

  • 0 in reply to Joshua Maize
    TI__Genius 12231 points

    Hi JH, 

    Section 1 (the GLB to SPB capacitor) is used to help with transients/voltage dips during switching, which could be helpful depending on how the parasitics of the power stage layout may negatively impact the performance.  

    However,  I am not as sure regarding the section 2 and 3 circuitry, and am still looking into this matter.

    It most likely is related to transient suppression as well.

    Best Regards, 

    -Joshua