Si5463EDC_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 16.0860 N/A 6.2479 RT2 12.6984 N/A 5.4874 RT3 16.6148 N/A 3.1152 RT4 54.6008 N/A 10.1495 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 121.6116 m N/A 13.1130 m CT2 831.4965 u N/A 742.4435 u CT3 11.8045 m N/A 244.5466 m CT4 1.4599 N/A 2.6459 m 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: 73979 Revision: 20-Jun-07 www.vishay.com 1 Si5463EDC_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 11.7135 N/A 5.2679 RF2 19.3968 N/A 13.3387 RF3 16.9799 N/A 5.0553 RF4 51.9097 N/A 1.3380 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 624.4938 u N/A 414.4321 u CF2 7.0377 m N/A 1.1607 m CF3 103.2634 m N/A 25.9795 m CF4 1.4252 N/A 1.2239 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: 73979 Revision: 20-Jun-07 Si5463EDC_RC Vishay Siliconix Document Number: 73979 Revision: 20-Jun-07 www.vishay.com 3