Si7962DP_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 4.3079 238.6633 m N/A RT2 7.4677 291.1519 m N/A RT3 13.8423 1.1148 N/A RT4 58.8764 1.0727 N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 5.2101 m 266.7345 m N/A CT2 42.1039 m 5.0160 N/A CT3 173.3669 m 1.1623 m N/A CT4 1.0551 8.8689 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: 73705 Revision 10-Jan-06 www.vishay.com 1 Si7962DP_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 6.8528 1.3023 N/A RF2 11.7756 686.0837 m N/A RF3 14.1535 452.3654 m N/A RF4 51.9506 262.6024 m N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 5.3726 m 982.6144 u N/A CF2 40.8226 m 7.1323 m N/A CF3 205.7289 m 25.0532 m N/A CF4 943.3135 m 5.7964 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: 73705 Revision 10-Jan-06 Si7962DP_RC Vishay Siliconix Document Number: 73705 Revision 10-Jan-06 www.vishay.com 3