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REF34-Q1: Tj and Tj temperature clarification

Art Mecina
Genius 16585 points
Part Number: REF34-Q1

Hello Guys,

Good day.

In the notice at 10.3.3 it is defined that Tj can not exceed 150°C.
In this way Tj max and Ta max are also 150°C?

Thanks for the confirmation.

Art

  • 0
    TI__Intellectual 1735 points

    Hi Art,

    Ta is added to the temperature rise to make for Tj. For example, you can have Ta of -40C, but with a PD of (for example) 1.8W and RJA=122C/W, you would have a temperature rise of 1.8*122 = 220C, bringing your junction temperature to 180C, which is beyond absolute maximum.

    In other words, TJ will always be greater than TA due to power dissipation as heat.