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R-C Thermal Model Parameters

R-C THERMAL MODEL FOR TANK CONFIGURATION

Vishay Siliconix
R-C Thermal Model Parameters
DESCRIPTION
The parametric values in the R-C thermal model have been derived using curve-fitting techniques. R-C values for the electrical circuit in the Foster / Tank and Cauer / Filter configurations are included. When implemented in P-Spice, these values have matching characteristic curves to the single-pulse transient thermal impedance curves for the MOSFET. These RC values can be used in the P-SPICE simulation to evaluate the thermal behavior of the MOSFET junction temperature under a defined power profile. These techniques are described in Application Note AN609, "Thermal Simulation of Power MOSFETs on the 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 721.5000 m 4.0594 11.7228 48.4963 Ambient 2.1848 m 46.9554 m 185.9092 m 1.4565 Case 245.8668 m 130.7588 m 689.2463 m 434.1281 m Case 2.1032 m 63.4203 m 11.8271 m 19.0799 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: 68833 Revision: 09-Jul-08
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Vishay Siliconix
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 1.0206 7.8136 13.1439 43.0219 Ambient 2.1696 m 46.0070 m 234.6585 m 1.3521 Case 400.8320 m 214.8692 m 98.0585 m 786.2403 m Case 1.7674 m 2.7808 m 28.5047 u 4.9884 m Foot N / A N / A N / A N / A Foot N / A N / A N / A N / A
Thermal Capacitance (Joules / °C)
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Document Number: 68833 Revision: 09-Jul-08
Vishay Siliconix
Document Number: 68833 Revision: 09-Jul-08
www.vishay.com 3