Si1419DH_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 31.7025 N/A 16.3442 RT2 9.6490 N/A 5.8412 RT3 27.6701 N/A 6.4092 RT4 55.6058 N/A 16.6502 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 2.4370 m N/A 1.4474 m CT2 296.8566 u N/A 165.7211 u CT3 34.2014 m N/A 159.1680 m CT4 1.2932 N/A 4.0724 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: 74972 Revision 12-Mar-07 www.vishay.com 1 Si1419DH_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 15.6106 N/A 9.3126 RF2 32.9349 N/A 21.7163 RF3 25.5324 N/A 8.4387 RF4 52.7888 N/A 5.5442 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 310.9572 u N/A 170.4864 u CF2 2.7712 m N/A 1.1574 m CF3 45.0379 m N/A 1.9990 m CF4 1.3696 N/A 191.7478 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: 74972 Revision 12-Mar-07 Si1419DH_RC Vishay Siliconix Document Number: 74972 Revision 12-Mar-07 www.vishay.com 3