SUM47N10-24L_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 N/A 85.0649 m N/A RT2 N/A 389.7232 m N/A RT3 N/A 257.7333 m N/A RT4 N/A 367.4785 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 N/A 866.2762 m N/A CT2 N/A 1.9029 m N/A CT3 N/A 35.7097 m N/A CT4 N/A 89.8563 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: 69741 Revision: 02-Oct-07 www.vishay.com 1 SUM47N10-24L_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 321.9701 m N/A RF2 N/A 139.7272 m N/A RF3 N/A 439.1969 m N/A RF4 N/A 197.3941 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 N/A 1.7350 m N/A CF2 N/A 1.1826 m N/A CF3 N/A 26.8611 m N/A CF4 N/A 173.6240 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: 69741 Revision: 02-Oct-07 SUM47N10-24L_RC Vishay Siliconix Document Number: 69741 Revision: 02-Oct-07 www.vishay.com 3