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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
T (Junction)
T (Ambient)
R-C VALUES FOR TANK CONFIGURATION
THERMAL RESISTANCE (°C / W) Junction to RT1 RT2 RT3 RT4 Junction to CT1 CT2 CT3 CT4 Note N / A indicates not applicable Ambient 13.3044 3.7268 22.1704 41.7984 Ambient 25.7575 m 3.0250 m 120.4017 m 2.0911 Case N / A N / A N / A N / A Case N / A N / A N / A N / A Foot 8.9352 1.5267 2.3889 8.1492 Foot 8.9395 m 612.8259 u 1.3469 120.2485 m
THERMAL CAPACITANCE (Joules / °C)
This document is intended as a SPICE modeling guideline and does not constitute a commercial product datasheet. Designers should refer to the appropriate datasheet of the same number for guaranteed specification limits.
Document Number: 64848 Revision: 09-Apr-09
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Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
T (Junction)
T (Ambient)
CF4 GND
R-C VALUES FOR FILTER CONFIGURATION
THERMAL RESISTANCE (°C / W) Junction to RF1 RF2 RF3 RF4 Junction to CF1 CF2 CF3 CF4 Note N / A indicates not applicable Ambient 4.2069 19.3118 19.3486 38.1327 Ambient 2.1239 m 18.5666 m 136.4733 m 2.1734 Case N / A N / A N / A N / A Case N / A N / A N / A N / A Foot 1.5331 9.7469 7.2795 2.4405 Foot 524.9641 u 7.2006 m 92.2570 m 720.1278 m
THERMAL CAPACITANCE (Joules / °C)
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Document Number: 64848 Revision: 09-Apr-09
Vishay Siliconix
Document Number: 64848 Revision: 09-Apr-09
www.vishay.com 3