Si4410BDY_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 6.3259 N/A 1.2118 RT2 18.7381 N/A 4.3804 RT3 13.7578 N/A 14.2755 RT4 51.2285 N/A 10.3800 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 4.2669 m N/A 749.6739 u CT2 104.5621 m N/A 36.0887 m CT3 25.9613 m N/A 106.4651 m CT4 1.3400 N/A 7.0772 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: 74999 Revision 15-Mar-07 www.vishay.com 1 Si4410BDY_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 7.5550 N/A 1.3324 RF2 18.5206 N/A 11.7068 RF3 16.1877 N/A 6.4286 RF4 47.8861 N/A 10.7164 Junction to Ambient Thermal Capacitance (Joules/°C) Case Foot 495.0417 u CF1 3.2457 m N/A CF2 15.1361 m N/A 4.5698 m CF3 105.6361 m N/A 16.5967 m CF4 1.3111 N/A 125.2612 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: 74999 Revision 15-Mar-07 Si4410BDY_RC Vishay Siliconix Document Number: 74999 Revision 15-Mar-07 www.vishay.com 3