• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 3 answers
  • Subscribers 63 subscribers
  • Views 392 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM5576: LM5576MH lifetime

Diego Rossini1
Prodigy 70 points
Part Number: LM5576

Hi all,

how much is the lifetime of this power IC?

Thanks,

Diego.

  • 0 in reply to Timothy Hegarty
    Prodigy 70 points

    Hi Tim,

    at that link I can see MTBF/FIT and EFR, but I don't see the lifetime of component..

    I must tell to the customer if the IC works for 20 years..

    For example: with the electrolitic capacitors I have made a calculation based on temperature, on lifetime indicated from the manufacturer and so I have found the lifetime of capacitor at certain functionality condiction..
    But this is different from MTBF..

    How can I find the lifetime of IC?

    Thank you,
    Diego.

  • 0 in reply to Diego Rossini1
    TI__Guru 73082 points

    Diego,

    The MTBF/FIT is what's typically used for such calculations. Assuming a well-designed circuit with recommended thermal management practices, there shouldn't be any problem to operate for 20 years or even longer.

    Regards,

    Tim

  • 0 in reply to Timothy Hegarty
    Prodigy 70 points

    I agree with you,

    but I must to certified, by calculating, by manufacturer's document, or others, that a component works correctly for 20 years..

    MTBF doesn't indicate lifetime, indicates that after a certain number of hours there is a damage on a machine..

    How can I, tell this number from MTBF?

    regards,
    Diego.

  • 0 in reply to Diego Rossini1
    TI__Guru 73082 points

    Hi Diego,

    I'm checking with another source for information, please standby.

    Regards,

    Tim

  • 0 in reply to Diego Rossini1
    TI__Guru 73082 points

    Hi Diego,

     

    As you mentioned, the FIT data/MTBF etc. just descibes failure rates, not how long it can be expected to last. We typically design the silicon in our parts to have a useful life of 100% on / 10 years @ 105degC junction temperature.

     

    In general, longer lifetime can be achieve by lowering the effective junction temperature and not exceeding recommended maximum temps. The rule of thumb is every 10degC reduction improves lifetime by 10 years. Similarly, it halves every 10degC increase. This is a TSSOP package, so board-level reliability (BLR) should not a concern (that often is the limitation of lifetime, not the silicon itself). Unfortunately, I can only provide these general points, nothing specific to the LM5576.

     

    Regards,

    Tim