Si4413ADY_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 6.1480 N/A 1.1236 RT2 24.4080 N/A 4.4461 RT3 26.0454 N/A 9.9726 RT4 27.2274 N/A 5.3859 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 22.0422 m N/A 9.0587 m CT2 56.2436 m N/A 129.7015 m CT3 3.5677 N/A 138.7031 m CT4 2.3495 N/A 11.4484 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: 74307 Revision: 07-May-07 www.vishay.com 1 Si4413ADY_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 2.4210 N/A 4.4473 RF2 16.7080 N/A 5.1144 RF3 13.7271 N/A 6.7581 RF4 51.0530 N/A 4.6120 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 2.9174 m N/A 5.1291 m CF2 28.3980 m N/A 11.2562 m CF3 39.1252 m N/A 82.6299 m CF4 1.4468 N/A 16.4486 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: 74307 Revision: 07-May-07 Si4413ADY_RC Vishay Siliconix Document Number: 74307 Revision: 07-May-07 www.vishay.com 3