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BOOSTXL-DRV8320H: BOOSTXL-DRV8320H

Merlin Tchadja wandji
Prodigy 40 points
Part Number: BOOSTXL-DRV8320H

Hi sir,

I plan to drive the BLDC motor using FOC algorithms and DRV8320H?
I need 6 PWM inputs. For my inverter i use CSD88539ND MOSFET and i do In-Line Shunt Precision-Phase Current Sensing With INA240.

My questions:

1-As detailed on page 29 of the datasheet i have to put the MODE Pin Tied to AGND?

2- Should i put one small capacitor (1µF) on each VDRAIN and ground? As detailed on page 60 (figure 51) of the datasheet?

3- I plan to do in line shunt current sensing, does Rsense as shown on the data sheet on page 60(figure 51 ) is mandatory?

4 -how to prevent ringing on the High-side source sense input (SHA, SHB, SHC )?


Thanks

  • 0
    TI__Guru** 114905 points
    Hi Merlin,

    FYI -- the BOOSTXL-DRV8320H schematic and layout is available on line as a guide.

    1-As detailed on page 29 of the datasheet i have to put the MODE Pin Tied to AGND?

    >> Correct, connect MODE pin to AGND

    2- Should i put one small capacitor (1µF) on each VDRAIN and ground? As detailed on page 60 (figure 51) of the datasheet?

    >> Yes, this is recommended

    3- I plan to do in line shunt current sensing, does Rsense as shown on the data sheet on page 60(figure 51 ) is mandatory?

    >> You need the ability to sense the current in each phase. This can be done on the low side as shown or on the high side.

    4 -how to prevent ringing on the High-side source sense input (SHA, SHB, SHC )?

    >> You may need snubbers on the phase pins. This is application dependent.