Si4562DY_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 N-Ch Ambient P-Ch Foot/Case RT1 8.3493 8.3493 N/A RT2 57.2012 57.2012 N/A RT3 34.2929 34.2929 N/A RT4 11.5647 11.5647 N/A Thermal Capacitance (Joules/°C) Junction to Ambient N-Ch Ambient P-Ch Foot/Case CT1 8.0575 m 8.0575 m N/A CT2 1.2098 1.2098 N/A CT3 29.0635 m 29.0635 m N/A CT4 240.4171 m 240.4171 m N/A 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: 74603 Revision: 09-May-07 www.vishay.com 1 Si4562DY_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Junction to Ambient N-Ch Ambient P-Ch Foot/Case RF1 8.5952 8.5952 N/A RF2 30.6769 30.6769 N/A RF3 17.2557 17.2557 N/A RF4 54.8803 54.8803 N/A Thermal Capacitance (Joules/°C) Junction to Ambient N-Ch Ambient P-Ch Foot/Case CF1 4.7344 m 4.7344 m N/A CF2 13.7556 m 13.7556 m N/A CF3 61.7041 m 61.7041 m N/A CF4 1.1142 1.1142 N/A 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: 74603 Revision: 09-May-07 Si4562DY_RC Vishay Siliconix Document Number: 74603 Revision: 09-May-07 www.vishay.com 3