Si4412ADY_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 31.4232 N/A 2.9078 RT2 13.6736 N/A 2.8167 RT3 7.1261 N/A 6.5116 RT4 42.2049 N/A 7.7032 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 110.1742 m N/A 9.6914 m CT2 34.8861 m N/A 595.8871 u CT3 1.9404 m N/A 181.8163 m CT4 2.0038 N/A 15.5796 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: 70351 Revision 15-Mar-07 www.vishay.com 1 Si4412ADY_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 8.0245 N/A 3.3450 RF2 23.9513 N/A 4.9736 RF3 24.3086 N/A 7.3229 RF4 38.5006 N/A 4.3471 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot 561.3554 u CF1 1.7185 m N/A CF2 26.0405 m N/A 4.3822 m CF3 121.6596 m N/A 15.3341 m CF4 2.0306 N/A 295.6411 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: 70351 Revision 15-Mar-07 Si4412ADY_RC Vishay Siliconix Document Number: 70351 Revision 15-Mar-07 www.vishay.com 3