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Generation of reduced thermal models of electronic systems from transient thermal response

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3 Author(s)
Janicki, M. ; Dept. of Microelectron. & Comput. Sci., Tech. Univ. of Lodz, Lodz, Poland ; Zubert, M. ; Napieralski, Andrzej

This paper presents a methodology for the creation of reduced thermal models of electronic systems based on the knowledge of the system dynamic temperature response. The registration of thermal responses using equidistant sampling on a logarithmic time scale allows the proper identification of all the time constants in the responses. Knowing the entire time constant spectrum, it is possible to generate a reduced dynamic thermal model in the form of an RC Cauer ladder with a limited number of stages. This simple model assures not only short simulation time and provides excellent accuracy but also allows the identification of certain physical parameters of a system. The methodology is illustrated in the paper based on the example of discrete power devices attached to a heat sink and cooled with forced air flow. The reduced thermal model is suitable for the direct implementation in the SPICE simulator or almost any other multiphysics simulation environment.

Published in:

Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2011 12th International Conference on

Date of Conference:

18-20 April 2011