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TPS7A20: Estimate Junction Temperature

KrnB
Intellectual 580 points
Part Number: TPS7A20

Hello, I am using thermal resistance R_JA & R_JC to estimate the Top Case & Junction Temp of TPS7A20 in SOT-23 package. Is it correct approach ?

What Copper Area is considered for which following datasheet numbers are mentioned. 

Can you please add TPS7A20 in SOT-23 package in PCB Thermal Calculator ? https://www.ti.com/design-resources/design-tools-simulation/models-simulators/pcb-thermal-calculator.html

  • 0
    TI__Genius 10330 points

    Hello,

    I will be working to answer this thread soon.

    Best,

    Hannah

  • 0
    TI__Genius 10330 points

    Hello,

    To estimate the junction temp, please use R_JB. Since the DBV version does not have a thermal pad / heat sink, the top case can be dismissed.

    Please read the following application report LDO Thermal Performance to find out more information about estimating top case and junction temp.

    The copper area calculated from 6.4 thermal information is based on JEDEC standard, jesd51-7 test board. 

    Plane 1, 1 oz. solid (0.070 mm), area is JEDEC standard as said above. 

    I am looking into having the TPS7A20 SOT-23 package added into the PCB thermal Calculator. 

    Please let me know if you have any additional questions or concerns.

    Best Regards,

    Hannah

  • 0
    Intellectual 580 points

    Thank you for the reply. Did you get chance to check addition of TPS7A20 SOT-23 package added into the PCB thermal Calculator ?

  • 0 in reply to KrnB
    TI__Genius 10330 points

    Hello,

    We are still working on adding TPS7A20 to the PCB thermal calculator.

    Best,