TLC2252AM: Thermal Information.

Hi Renan,

This is the thermal information in this part, if I understood your question correctly. Yes, the data is presented in different format. I believe that these figures refers to Junction to package thermal power dissipation. 

For Instance in JG package. the nominal specific power rating is 1050mW (Ta <= 25C). Derating factor is 8.4mV/C above 25C. 

For Ta=70C, the delta Ta = 70-25=45C, derating power dissipation in mW is rated 8.4mW/C*45=378mW --> power dissipation 1050mW-382.5m <= 672mW at 70C

For Ta=85C, the delta Ta = 60C, derating power dissipation in mW is rated 8.4mW/C*60C =504 mW  -->  power dissipation 1050mW-504m <= 546 mW at 85C

For Ta=125, the delta Ta = 100C, derating power dissipation in mW is rate 8.4mW/C*100C =840 mW --> power dissipation 1050mW-840m <=  210 mW  (power dissipation is specified  <275mW at Ta=125C)

If you are interested to see the derating factor in C/W figure, you can inverse 11.0mV/C to 90.1C/W (equivalent to Junction-to-case thermal resistance as an example). 

If you have other questions, please let me know. 

Best,

Raymond