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DRV8323: Unused driver stage pins

HS FAE Germany
Mastermind 30485 points
Part Number: DRV8323

Hello,
should the pins of an unused driver stage be unconnected/open?

Regards, Holger

  • 0
    TI__Intellectual 1345 points
    Hi Holger,
    The best practice is to connect the unused SHx to GND. There are a few other considerations based on how the other phases are being used, so it is ideal if you can share the complete details of the load and supply configuration on each of the phases.
  • 0 in reply to Anuj Narain
    TI__Mastermind 30485 points

    Anuj,
    ok. In the User's Guide on page 33 it says unconnected:

    If the half-bridge is used to implement only a high-side or low-side driver, using the VDS overcurrent monitors is
    still possible. Connect the SHx pin as shown in Figure 21 or Figure 22. The unused gate driver and the
    corresponding input can stay disconnected.

    Is both ok?

    Regards, Holger

  • 0 in reply to HS FAE Germany
    TI__Guru 61200 points
    Holger,

    The advice Anuj mentioned above is for when you are not using a complete phase. We didn't understand that you meant an unused Highside or unused lowside. The datasheet on page 33 is correct.

    Regards,

    -Adam