Si7192DP_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 7.4196 348.4044 m N/A RT2 2.1814 354.8360 m N/A RT3 12.1505 345.7792 m N/A RT4 32.2485 150.9804 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 106.1714 m 25.7863 m N/A CT2 21.0646 m 81.7383 m N/A CT3 1.2519 309.8845 m N/A CT4 3.2293 1.0267 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: 69926 Revision: 12-Dec-07 www.vishay.com 1 Si7192DP_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 3.5655 173.7148 m N/A RF2 7.9531 554.4925 m N/A RF3 20.7479 233.8971 m N/A RF4 21.7335 237.8956 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 18.9463 m 1.1765 m N/A CF2 95.2321 m 17.7066 m N/A CF3 827.8730 m 53.3298 m N/A CF4 3.8092 297.9412 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: 69926 Revision: 12-Dec-07 Si7192DP_RC Vishay Siliconix Document Number: 69926 Revision: 12-Dec-07 www.vishay.com 3