SUD50N04-09H_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 1.2168 646.0542 m N/A RT2 5.5392 476.0687 m N/A RT3 6.7115 240.0109 m N/A RT4 36.5325 437.8662 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 3.2446 m 16.5170 m N/A CT2 981.0913 m 1.7413 m N/A CT3 57.1498 m 980.9683 m N/A CT4 1.9724 7.0573 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: 69601 Revision: 10-Sep-07 www.vishay.com 1 SUD50N04-09H_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 1.8265 656.6173 m N/A RF2 7.5719 107.8648 m N/A RF3 16.0225 783.4607 m N/A RF4 24.5791 252.0572 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 4.2254 m 1.1622 m N/A CF2 54.5421 m 3.6541 m N/A CF3 821.0018 m 2.0461 m N/A CF4 1.8578 750.3127 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: 69601 Revision: 10-Sep-07 SUD50N04-09H_RC Vishay Siliconix Document Number: 69601 Revision: 10-Sep-07 www.vishay.com 3