Si7403DN_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 4.0717 3.3906 m N/A RT2 7.4833 4.0969 N/A RT3 3.8288 2.7480 N/A RT4 24.5271 6.1365 N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 348.8589 µ 5.9490 m N/A CT2 97.5917 m 2.6287 m N/A CT3 17.8527 m 179.8970 µ N/A CT4 2.2724 2.2760 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: 73630 Revision 28-Nov-05 www.vishay.com 1 Si7403DN_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Junction to Ambient Case RF1 4.1437 124.1312 µ Foot N/A RF2 6.8917 4.4419 N/A RF3 5.7062 2.2358 N/A RF4 23.2365 6.3307 N/A Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 320.3300 µ 68.8397 µ N/A CF2 17.4324 m 108.2869 µ N/A CF3 195.1591 m 1.2505 m N/A CF4 2.2464 297.4337 µ 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: 73630 Revision 28-Nov-05 Si7403DN_RC Vishay Siliconix Document Number: 73630 Revision 28-Nov-05 www.vishay.com 3