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  • TI Thinks Resolved

THS4131: What different between Thermal Information and Dissipation Ratings

Prodigy 490 points

Replies: 1

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Part Number: THS4131

Hello,

My customer questioned what different between Thermal Information and Dissipation Ratings.

When I checked datasheet, based on D package, θJA is 97.5 and RθJA is 114.5. Why these are different?

Thank you.

  • Hi,

    The thermal information table gives the generic information for the packaged part without considering any other factors. The Dissipation ratings gives the values when measured on a JEDEC high-K pcb. You can read more about the differences in the thermal metrics and a good explanation of theta JA in this application report.

    www.ti.com/.../spra953c.pdf

    Regards,

    Jacob Freet 
    High Speed Amplifiers

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