SUD50P04-09L_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 1.4554 113.2223 u N/A RT2 12.5124 502.7505 m N/A RT3 25.6250 314.1307 m N/A RT4 10.1693 283.3527 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 1.0884 m 5.3736 u N/A CT2 1.6515 40.9686 m N/A CT3 1.7830 169.9421 m N/A CT4 109.5321 m 2.2444 m 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: 69625 Revision: 18-Sep-07 www.vishay.com 1 SUD50P04-09L_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Foot Junction to Ambient Case RF1 1.6136 198.3346 m N/A RF2 12.0299 212.2665 m N/A RF3 14.4150 113.8168 m N/A RF4 21.8186 573.4861 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 2.4056 m 1.7325 m N/A CF2 95.2080 m 4.8215 m N/A CF3 607.6779 m 37.5796 m N/A CF4 871.5875 m 4.6520 m 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: 69625 Revision: 18-Sep-07 SUD50P04-09L_RC Vishay Siliconix Document Number: 69625 Revision: 18-Sep-07 www.vishay.com 3