Si7384DP_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 38.0097 626.8248 m N/A RT2 11.6444 917.9595 m N/A RT3 16.7121 615.9675 m N/A RT4 3.6338 839.2482 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 2.5147 849.0415 u N/A CT2 56.3927 m 7.2331 m N/A CT3 1.4208 41.4201 m N/A CT4 2.3469 m 7.8997 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: 69208 Revision: 23-Jul-07 www.vishay.com 1 Si7384DP_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Foot Junction to Ambient Case RF1 3.8220 977.4601 m N/A RF2 12.2219 1.4695 N/A RF3 27.1389 362.5592 m N/A RF4 26.8172 190.4807 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 2.0776 m 713.7948 u N/A CF2 47.6072 m 3.1289 m N/A CF3 761.5892 m 17.1533 m N/A CF4 2.0814 14.2944 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: 69208 Revision: 23-Jul-07 Si7384DP_RC Vishay Siliconix Document Number: 69208 Revision: 23-Jul-07 www.vishay.com 3