Time domain dynamic electrothermal macromodeling for thermally aware integrated system design

Time domain identification of reduced dynamic thermal models is pursued with well established macromodeling techniques, providing electrical equivalents to be integrated in standard circuit simulators. Self and mutual thermal impedances of electronic structures, preliminarily evaluated through accurate 3-D FEM thermal simulations, are directly identified with Time Domain Vector Fitting and synthesised in a lumped PSPICE circuit. Two relevant examples of dynamic electrothermal cosimulation are given, the results of which exhibit significant differences with respect to their isothermal counterparts.