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DRV8243-Q1: Diagnostics questions

Sherry Liang
Genius 10255 points
Part Number: DRV8243-Q1

Dear team,

Could you please help answer below questions? Thanks!

1. For below box marked in blue, nFault=L at normal mode and GND short condition, nFault=H at open fault condition and VM short condition. How to distinguish them? I don't see any register show OLP diagnostics status.

2. Below table only indicates the diagnostic status of active mode, right?

Thanks & Best Regards,

Sherry

  • +1
    TI__Mastermind 23431 points

    Hey Sherry,

    Sherry Liang said:
    1. For below box marked in blue, nFault=L at normal mode and GND short condition, nFault=H at open fault condition and VM short condition. How to distinguish them? I don't see any register show OLP diagnostics status.

    The difference is whether the user set up ROLP as a pull up or pull-down.  Based on this setup you can know whether your result is indicating short or open.  

    Sherry Liang said:
    2. Below table only indicates the diagnostic status of active mode, right?

    Yes, that register reports the status of those conditions

    Regards,

    Jacob