SUU_SUD50N04-10P_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 3.2826 1.2293 N/A RT2 13.4022 391.5527 m N/A RT3 5.6621 189.7297 m N/A RT4 24.6531 989.4176 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 828.3685 u 82.4980 m N/A CT2 1.1833 536.3372 u N/A CT3 106.2645 m 8.1789 N/A CT4 4.0410 9.3289 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: 70463 Revision: 03-May-07 www.vishay.com 1 SUU_SUD50N04-10P_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 3.3071 383.7733 m N/A RF2 6.0949 776.4911 m N/A RF3 17.8136 1.0993 N/A RF4 19.7844 540.4356 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 781.3270 u 444.0068 u N/A CF2 82.7431 m 5.3570 m N/A CF3 710.9495 m 27.2059 m N/A CF4 3.7141 637.1980 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: 70463 Revision: 03-May-07 SUU_SUD50N04-10P_RC Vishay Siliconix Document Number: 70463 Revision: 03-May-07 www.vishay.com 3