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LM5022-Q1: AMR questions

Mingkang Song
Expert 3320 points
Part Number: LM5022-Q1
Other Parts Discussed in Thread: LM5022

Dear team,

①If the working range of this chip falls in region B, what kind of usage restrictions will there be? Could you explain it in detail?

②If the working junction temperature of the chip exceeds 125°C, how much will the lifespan be reduced? Could you quantify it? Thanks!

  • 0
    TI__Mastermind 19595 points

    Hello Mingkang,

    Thanks for reaching out to us via e2e.

    The usage restrictions in region B are neither specified nor tested and maybe not even properly pedictable.
    The effects are ranging from a simple non-linearity to certain abrupt limits and even malfunctions.
    The device itself will not immediately break, but maybe the overall converter including external components may get into a critical state.

    A design should not be built in a way where you already know that the recommended operating conditions will be violated.

    Regarding the reduction of the lifespan at over 125°C I will need to ask the designers.
    It may take until next week before I will get an answer on that question.

    All information in this correspondence and in any related correspondence is provided “AS IS” and “with all faults” and is subject to TI’s Important Notice (www.ti.com/.../important-notice.shtml).

    Best regards
    Harry

  • 0 in reply to Harry Hofner
    TI__Expert 3320 points

    Thank you so much for your answer!

    Please help to evaluate the mission profile listed below (yellow part is the input, white part is our calculation based on Arrhenius module),  on our side we think this mission profile already exceeded AECQ-100 Grade 1.

    What did TI do on this LM5022 for HTOL test? What is the environment temperature? Junction temperature? Lifetime(Like 2000hrs)? If failed, what is the failure mode? This is related to the order specification of LM5022, Thank you!

  • 0 in reply to Mingkang Song
    TI__Mastermind 19595 points

    Hello Mingkang,

    I have forwarded your questions internally.

    Again, please allow some time until next week before I will get you an answer.

    All information in this correspondence and in any related correspondence is provided “AS IS” and “with all faults” and is subject to TI’s Important Notice (www.ti.com/.../important-notice.shtml).

    Best regards
    Harry

  • 0 in reply to Harry Hofner
    TI__Mastermind 19595 points

    Hello Mingkang, 

    TI cannot confirm the calculation of the customer.

    Conversation was continued via email.
    e2e thread closed.

    Best regards
    Harry