Si4392DY_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 10.4113 N/A 6.0448 RT2 3.9640 N/A 2.0658 RT3 20.2637 N/A 4.5367 RT4 55.1735 N/A 7.3694 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 23.2596 m N/A 37.9136 m CT2 3.6109 m N/A 1.4121 m CT3 97.4843 m N/A 11.6129 m CT4 1.5032 N/A 200.6871 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: 73823 Revision 02-Mar-06 www.vishay.com 1 Si4392DY_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 6.6798 N/A 3.0102 RF2 20.1253 N/A 8.1843 RF3 14.8475 N/A 6.6156 RF4 48.7035 N/A 2.2015 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 3.0324 m N/A 1.3575 m CF2 27.3271 m N/A 8.4713 m CF3 257.9096 m N/A 85.1777 m CF4 1.5513 N/A 578.1296 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: 73823 Revision 02-Mar-06 Si4392DY_RC Vishay Siliconix Document Number: 73823 Revision 02-Mar-06 www.vishay.com 3