A lot of papers on this topic have been published since then. JEDEC also published standard of DELPHI Compact Thermal Model Guideline [3] and Two-Resistor Compact Thermal Model Guideline [4]. Many ...

Therman uses an FFT technique to calculate steady-state and dynamic thermal performance ... Another program with strong links to the Delphi compact-model-standardization effort is Flomerics' Flopack.