Si7368DP_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) Foot Junction to Ambient Case RT1 37.0478 607.2000 m N/A RT2 13.0052 1.0349 N/A RT3 13.9287 1.3995 N/A RT4 6.0183 1.4584 N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 2.0961 1.6559 m N/A CT2 105.8243 m 43.1677 m N/A CT3 2.4036 125.7930 m N/A CT4 8.7373 m 30.7373 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: 69207 Revision: 23-Jul-07 www.vishay.com 1 Si7368DP_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Foot Junction to Ambient Case RF1 5.9544 896.7111 m N/A RF2 12.5333 907.5261 m N/A RF3 22.6582 2.2586 N/A RF4 28.8541 437.1628 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 6.5530 m 1.8472 m N/A CF2 66.7118 m 16.6692 m N/A CF3 646.5345 m 871.9487 u N/A CF4 1.7654 288.3437 m 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: 69207 Revision: 23-Jul-07 Si7368DP_RC Vishay Siliconix Document Number: 69207 Revision: 23-Jul-07 www.vishay.com 3