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R-C Thermal Model Parameters

R-C values for the electrical circuit in the Foster / Tank and Cauer / Filter configurations are included.

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R-C Thermal Model Parameters
DESCRIPTION The parametric values in the R-C thermal model have been derived using curve-fitting techniques. These techniques are described in "A Simple Method of Generating Thermal Models for a Power MOSFET"1. When implemented in P-Spice, these values have matching characteristic curves to the Single Pulse Transient Thermal Impedance curves for the MOSFET.
R-C values for the electrical circuit in the Foster / Tank and Cauer / Filter configurations are included.
Note:
For a detailed explanation of implementing these values in P-SPICE, refer to Application Note AN609 Thermal Simulations Of Power MOSFETs on P-SPICE Platform.
R-C THERMAL MODEL FOR TANK CONFIGURATION
R-C VALUES FOR TANK CONFIGURATION
Thermal Resistance (°C / W) Junction to RT1 RT2 RT3 RT4 Junction to CT1 CT2 CT3 CT4 Ambient 37.4121 11.9075 17.7112 2.9692 Ambient 2.2919 69.9170 m 1.2812 10.8719 m Case 456.8056 m 594.2164 m 243.1780 m 1.0058 Case 1.8736 m 15.1576 m 19.6083 m 24.0739 m Foot N / A N / A N / A N / A Foot N / A N / A N / A N / A
Thermal Capacitance (Joules / °C)
This document is intended as a SPICE modeling guideline and does not constitute a commercial product data sheet. Designers should refer to the appropriate data sheet of the same number for guaranteed specification limits.
Document Number: 69265 Revision: 06-Aug-07
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R-C THERMAL MODEL FOR FILTER CONFIGURATION
R-C VALUES FOR FILTER CONFIGURATION
Thermal Resistance (°C / W) Junction to RF1 RF2 RF3 RF4 Junction to CF1 CF2 CF3 CF4
Note: NA indicates not applicable
Ambient 3.7073 11.9067 26.3342 28.0518 Ambient 8.4590 m 50.6640 m 617.4415 m 1.8369
Case 677.6259 m 648.3863 m 485.5114 m 488.4764 m Case 1.4523 m 4.0094 m 7.7628 m 24.6477 m
Thermal Capacitance (Joules / °C)
Reference: 1 "A Simple Method of Generating Thermal Models for a Power MOSFET" by Wharton McDaniel and Kandarp Pandya, IEEE / SEMITHERM 2002
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Document Number: 69265 Revision: 06-Aug-07
Vishay Siliconix
Document Number: 69265 Revision: 06-Aug-07
www.vishay.com 3