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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 10.7568 38.6781 34.7951 40.7699 Ambient 1.3053 m 38.5832 m 24.6875 m 1.6892 Case N / A N / A N / A N / A Case N / A N / A N / A N / A Foot 3.0651 43.8693 11.3230 11.7426 Foot 263.8942 u 29.7486 m 79.1707 m 4.8454 m
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: 74830 Revision: 10-Jul-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 13.9187 40.4017 31.8717 38.8080 Ambient 1.3348 m 13.2984 m 10.7206 m 1.8651
Foot 4.2361 18.1356 19.8866 27.7418 Foot 283.8979 u 4.4710 m 18.4202 m 6.8324 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: 74830 Revision: 10-Jul-07
Vishay Siliconix
Document Number: 74830 Revision: 10-Jul-07
www.vishay.com 3