SUM40N02-12P_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 661.9731 m N/A RT2 N/A 173.0223 m N/A RT3 N/A 690.1674 m N/A RT4 N/A 274.8372 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 N/A 3.5780 m N/A CT2 N/A 2.0408 m N/A CT3 N/A 29.4475 m N/A CT4 N/A 883.1728 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: 69793 Revision: 19-Oct-07 www.vishay.com 1 SUM40N02-12P_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 784.2859 m N/A RF2 N/A 431.8711 m N/A RF3 N/A 345.9260 m N/A RF4 N/A 237.9170 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 N/A 1.5274 m N/A CF2 N/A 19.5179 m N/A CF3 N/A 227.8424 u N/A CF4 N/A 1.1539 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: 69793 Revision: 19-Oct-07 SUM40N02-12P_RC Vishay Siliconix Document Number: 69793 Revision: 19-Oct-07 www.vishay.com 3