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TPS7A25: Thermal parameters - JA & JC

Intellectual 2125 points

Replies: 3

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Part Number: TPS7A25

Normally thermal resistance JA is higher than JC. In TPS7A25, JA is 73 while JC is 90. Any specific reason for this behavior ? Also, could you please help to confirm same ? 

Best Regards,

Prahlad

  • Hi Prahlad,

    We show two JC numbers as shown below:

    RTJC(TOP) is from the die to the top of the package through the mold-compound.  RTJC(BOT) is from the die to the packages power pad. Here is an illustraion of the different parameters:

    This is showing how the paths for heat to escape the package relate to RTJA.

    The fundamental reason for the higher number is we have a smaller die, which means a smaller surface area to spread the heat.

    I hope this helps to answer your question.

    John Cummings 蔣康明
    Texas Instruments 德洲儀器
    Johncummings@ti.com

    Please click the "Resolved" link at the bottom of this post if I have answered your question.

    Thank you,

  • In reply to JCHK:

    Thanks for clarifying

    Best Regards,

    Prahlad

  • In reply to PRAHLAD Supeda:

    HI Prahlad,

    You are welcome!

    John Cummings 蔣康明
    Texas Instruments 德洲儀器
    Johncummings@ti.com

    Please click the "Resolved" link at the bottom of this post if I have answered your question.

    Thank you,

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