Si6413DQ_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 8.2256 N/A 1.2686 RT2 25.3685 N/A 26.8179 RT3 23.6711 N/A 9.2882 RT4 62.7348 N/A 7.6253 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 12.8734 m N/A 2.7262 m CT2 64.8508 m N/A 28.4942 m CT3 27.5267 m N/A 249.8027 m CT4 1.4374 N/A 13.8421 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: 70620 Revision: 27-Jun-07 www.vishay.com 1 Si6413DQ_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 8.3990 N/A 2.4011 RF2 34.6353 N/A 13.4572 RF3 19.0115 N/A 18.1637 RF4 57.9541 N/A 10.9781 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 5.4706 m N/A 2.6364 m CF2 8.7790 m N/A 6.2356 m CF3 98.0028 m N/A 15.9082 m CF4 1.4307 N/A 89.3111 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: 70620 Revision: 27-Jun-07 Si6413DQ_RC Vishay Siliconix Document Number: 70620 Revision: 27-Jun-07 www.vishay.com 3