TP0101K_RC Vishay Siliconix 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) Foot Junction to Ambient Case RT1 57.6290 N/A N/A RT2 124.8459 N/A N/A RT3 165.4179 N/A N/A RT4 224.2225 N/A N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 310.3472 u N/A N/A CT2 19.5184 m N/A N/A CT3 1.1682 m N/A N/A CT4 600.6152 m N/A N/A 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: 68384 Revision: 04-Jan-08 www.vishay.com 1 TP0101K_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Junction to Ambient Case Foot RF1 87.1458 N/A N/A RF2 154.9843 N/A N/A RF3 113.2883 N/A N/A RF4 216.6971 N/A N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 239.4360 u N/A N/A CF2 943.6527 u N/A N/A CF3 19.9458 m N/A N/A CF4 594.5374 m N/A N/A Note: NA indicates not applicable Reference: [1] "A Simple Method of Generating Thermal Models for a Power MOSFET" by Wharton McDaniel and Kandarp Pandya, IEEE / SEMITHERM 2002 www.vishay.com 2 Document Number: 68384 Revision: 04-Jan-08 TP0101K_RC Vishay Siliconix Document Number: 68384 Revision: 04-Jan-08 www.vishay.com 3