SUD50N03-09P_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) Junction to Ambient Case Foot RT1 N/A 613.1814 m N/A RT2 N/A 131.3255 m N/A RT3 N/A 661.3685 m N/A RT4 N/A 894.1246 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 N/A 31.7804 m N/A CT2 N/A 183.8119 m N/A CT3 N/A 213.3306 m N/A CT4 N/A 16.0218 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: 69589 Revision: 04-Sep-07 www.vishay.com 1 SUD50N03-09P_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 N/A 664.2683 m N/A RF2 N/A 981.2755 m N/A RF3 N/A 396.9639 m N/A RF4 N/A 257.4923 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 N/A 8.3147 m N/A CF2 N/A 3.2204 m N/A CF3 N/A 76.8447 m N/A CF4 N/A 640.3763 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: 69589 Revision: 04-Sep-07 SUD50N03-09P_RC Vishay Siliconix Document Number: 69589 Revision: 04-Sep-07 www.vishay.com 3