Setup thermal/FEA model and adjust heat transfer coefft until same Tc is obtained for given Ta and P.
Model will predict Tj (local) by estimating deltaT as P x Theta-jc from experiment (= [Tjlocal - Tc]/P)
Tj (local) = Tc + delta T
Force Tjlocal predicted from model to match Tjlocal from experiment, by adjusting local TIM1 thermal resistance.
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