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PCM4104 and PCM4204 thermal details

The datasheets for both the 4104 and 4204 only give maximum operating temperatures and not Tjunction max or heat dissipation. The sheet refers to 'over operating free-air temperature range', the measurement of which is unclear. If I check the Tcase temperature of the converters using a thermal probe I get readings as high as 102°C. How does this compare with Tjunc or max operating conditions.