SUP90N10-8m8P_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 31.5841 69.0737 m N/A RT2 736.5000 m 132.9812 m N/A RT3 2.9311 149.4828 m N/A RT4 4.7483 148.4623 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 2.8728 11.4355 m N/A CT2 200.9925 m 512.4947 m N/A CT3 730.7719 m 68.1290 m N/A CT4 26.2971 239.9071 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: 69746 Revision: 02-Oct-07 www.vishay.com 1 SUP90N10-8m8P_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 643.7000 m 108.9512 m N/A RF2 3.9845 15.2516 m N/A RF3 16.3586 254.3985 m N/A RF4 19.0132 121.3987 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 36.1175 m 10.3809 m N/A CF2 468.1577 m 22.6075 m N/A CF3 1.9545 25.6998 m N/A CF4 628.5618 m 435.3431 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: 69746 Revision: 02-Oct-07 SUP90N10-8m8P_RC Vishay Siliconix Document Number: 69746 Revision: 02-Oct-07 www.vishay.com 3