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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 11.5072 1.6029 8.8467 43.0432 Ambient 713.8709 m 6.5534 m 55.9660 m 1.7449 Case 73.5297 m 481.0169 m 442.7555 m 502.6979 m Case 95.9006 u 32.1985 m 10.4753 m 35.3560 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: 69222 Revision: 24-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 5.7262 8.7232 19.7812 30.7694 Ambient 16.1380 m 97.4808 m 502.8691 m 1.7111
Case 70.5542 m 644.8877 m 259.7859 m 524.7722 m Case 439.8910 u 5.0258 m 10.1882 m 67.4933 u
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: 69222 Revision: 24-Jul-07
Vishay Siliconix
Document Number: 69222 Revision: 24-Jul-07
www.vishay.com 3