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LM5163: Function safety - Table 4-4 more details needed

Nicholas Carley
Genius 9895 points
Part Number: LM5163

In table 4-4 of the function safety document for the LM5163 (https://www.ti.com/lit/fs/sffs341/sffs341.pdf). This is for failure when adjacent pins are shorted together, but for the package pinout, the 4 middle pins have 2 adjacent pins not just one. The table doesn't explain which adjacent pins are being shorted when there are 2 options. Is there further detail on the test conditions for the middle pins of the package?

  • 0
    TI__Guru* 78060 points

    Hi Nicolas,

    Thank you for posting. My understanding is it refers to both directions, namely covering both options,  and lists the worse failure effect class in the table. 

    Best Regards,

    Youhao

  • 0 in reply to Youhao Xi
    TI__Guru* 78060 points

    Hi Nicolas,

    Sorry I mistakenly hit TI Thinks Resolve.  I am also checking with our team to get a confirmed explanation. I will update ASAP.

    Thanks,

    Youhao

  • +1 in reply to Youhao Xi
    TI__Guru* 78060 points

    Hi Nicolas,

    Sorry for the delay.  We investigated and we agree that Table 4-4 is confusing.  We will need to update it but I cannot give you a specific timeline. 

    To support this customer so they can move on with the design, I did an preliminary update of Table 4-4 for their reference.  In this table, the short is always between a pair of pins without much ambiguity.  See below for your reference. 

    Wish this helps.

    Best Regards,

    Youhao