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UCC21520: thermal de-rating plots

[FAE] Andrew Wang
Genius 10685 points
Part Number: UCC21520

Hi Team,

Customer would like to know how to read below graph? What do they mean?

The curve changes with ambient Temp, so either device self-heating or surrounding heating can apply to the same curve? Thanks.

Andrew

  • 0
    TI__Guru**** 189401 points

    Hi Andrew,

    Great to hear from you.

    Basically, power dissipated inside the IC is converted to heat. As the ambient temperature goes up, the amount of heat that can be removed is reduced (the maximum allowable junction temperature doesn't change).

    Here is a short app note that discusses it in further detail:

    If you have additional questions, please let me know, otherwise, please press the green button for me!