Si4830ADY_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 13.0656 N/A 9.3617 RT2 20.5465 N/A 2.3284 RT3 22.5226 N/A 10.2063 RT4 53.8653 N/A 18.1036 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 3.3420 m N/A 22.2638 m CT2 33.6337 m N/A 489.6651 u CT3 96.9086 m N/A 5.9249 m CT4 1.6915 N/A 96.5142 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: 74622 Revision: 15-May-07 www.vishay.com 1 Si4830ADY_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 14.8607 N/A 2.6845 RF2 25.5258 N/A 16.8421 RF3 18.1142 N/A 14.1159 RF4 51.4993 N/A 6.3575 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot 466.0878 u CF1 2.8276 m N/A CF2 17.8677 m N/A 3.9497 m CF3 75.1793 m N/A 42.3410 m CF4 1.6685 N/A 337.6181 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: 74622 Revision: 15-May-07 Si4830ADY_RC Vishay Siliconix Document Number: 74622 Revision: 15-May-07 www.vishay.com 3