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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 7.6691 9.6873 1.2814 49.3622 Ambient 61.3086 m 463.2876 m 3.1110 m 1.4462 Case 313.7497 m 989.3708 m 305.3409 m 591.5386 m Case 987.7539 u 14.0212 m 4.8203 m 24.5851 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: 68877 Revision: 23-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 1.7079 11.7345 10.9997 43.5579 Ambient 3.3514 m 62.6881 m 403.7794 m 1.1413 Case 634.3858 m 660.8575 m 304.5506 m 600.2061 m Case 890.4959 u 6.0595 m 1.0483 m 11.0543 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: 68877 Revision: 23-Jul-08
Vishay Siliconix
Document Number: 68877 Revision: 23-Jul-08
www.vishay.com 3