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ISO7740: iso7740 lost of isolation

christophe duchemin
Prodigy 50 points
Part Number: ISO7740
Other Parts Discussed in Thread: ISO7820

Hello,

We discuss internally the lost of hvdc (high voltage) isolation due to iso7740 (on also on iso7820...).

I guess that the lost of isolation is very rare (reading different document on the subject) but right now I have no data to quantify that (FIT rate and FDM). Is there any failure distribution mode value on lose of isolation on these devices?

I found FIT rates of these devices on your web site.

Thank you for your support,

Christophe Duchemin

  • 0
    TI__Mastermind 49545 points

    Hi Christophe,

    Thanks for reaching out.

    I am not quite sure what kind of data you are looking for to prove that the ISO device isolation barrier is robust. Maybe you can refer to the TDDB lifetime plot from ISO7740 datasheet that shows the amount of margin maintained to the device isolation ratings specifications.

    FIT is for the overall device, hence, you can use this as well for your analysis.

    Not sure if TDDB lifetime plot addresses your question but if it doesn't, please do let us know what kind of data you are looking for. Thanks.


    Regards,
    Koteshwar Rao