Si1304BDL_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 86.2144 N/A 109.0121 RT2 12.9988 N/A 61.4733 RT3 59.3482 N/A 52.1187 RT4 201.4386 N/A 117.3959 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 1.0588 m N/A 454.0514 u CT2 191.2934 u N/A 152.3679 u CT3 654.7914 m N/A 6.3434 m CT4 4.4576 m N/A 356.4596 u 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: 70332 Revision: 21-Jun-07 www.vishay.com 1 Si1304BDL_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 34.7603 N/A 139.0304 RF2 131.7373 N/A 141.9360 RF3 139.2935 N/A 54.5340 RF4 54.2089 N/A 4.4996 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 258.0262 u N/A 83.3944 u CF2 911.3508 u N/A 116.5141 u CF3 5.5458 m N/A 2.9182 m CF4 822.8806 m N/A 268.9115 m 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: 70332 Revision: 21-Jun-07 Si1304BDL_RC Vishay Siliconix Document Number: 70332 Revision: 21-Jun-07 www.vishay.com 3