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TPS6593x-Q1 pull-down resistance on EN_DRV?

Andreas Münich
Prodigy 40 points

The FS Manual mentions [SA_29] “The actuator has a pull-down resistance on its input pin connected to the (?) of the TPS6593x-Q1”. Is it the EN_DRV?

If so, then the data sheet specifies something different in ch. 6.1 table 6-2: “RECOMMENDED EXTERNAL PU/PD - none”. Which is correct?

  • 0
    TI__Mastermind 20257 points

    Hello Andreas,

    as per this question and the other regarding pull-down resistance on the SoC side, let me check in the with the team in order to best answer this question.

    BR,

    Nicholas

  • 0 in reply to Nicholas McNamara
    TI__Mastermind 20257 points

    Following up Andreas,

    please see the following solution: (link here)

    as it explains the reasoning for the SA and how it should be configured to adhered.

    BR,

    Nicholas

  • 0
    TI__Intellectual 1215 points

    Hello Andreas,

    the [SA_29] indeed refers to the EN_DRV pin. The reason that we have this [SA_29] for the EN_DRV pin in the Safety Manual is similar to the [SA_32] for the nRSTOUT pin. In case of a open-connect at the EN_DRV pin due to a random fault, the adherance to [SA_29] makes the system inheritly safe for such a fault.

    The datasheet ch. 6.1 table 6-2: “RECOMMENDED EXTERNAL PU/PD” refers to the required application needs to make the device operate as specified, without considering random faults. So this table 6-2 indeeds specifies that the EN_DRV pin does not require a pull-up or pull-down to meet its specified operation.