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TPA3111D1: Junction temperature calculation

Expert 4780 points
Part Number: TPA3111D1


Dear e2e support,

We would like double check with you the result we have in the calculation of the junction temperature of our TPA3111.

Here are our measurments:

- Package temperature (top) = 73°C

- Power dissipation = 5W (for 16Wrms output power)

Junction temperature calculated (eq 8 in our SPRA953C documentation) : 73 + 0.9 * 5 = 77.5°C

Is this result coherent for you (not too low)?

Regards,