Si3483DV_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 6.9748 N/A 10.2073 RT2 9.3362 N/A 2.5130 RT3 42.4493 N/A 8.3590 RT4 51.1267 N/A 8.9386 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 1.9916 m N/A 5.8856 m CT2 7.9736 m N/A 448.1246 µ CT3 12.6508 m N/A 42.8629 m CT4 1.2020 N/A 9.5199 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: 73527 Revision 25-Aug-05 www.vishay.com 1 Si3483DV_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 17.7112 N/A 3.2167 RF2 15.3855 N/A 10.4678 RF3 26.4729 N/A 10.9615 RF4 50.2298 N/A 5.3440 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 1.7309 m N/A 497.9077 µ CF2 8.3273 m N/A 2.6562 m CF3 2.9762 m N/A 993.4035 µ CF4 1.1950 N/A 56.7081 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: 73527 Revision 25-Aug-05 Si3483DV_RC Vishay Siliconix Document Number: 73527 Revision 25-Aug-05 www.vishay.com 3