SiA467DJ_RC www.vishay.com Vishay Siliconix R-C Thermal Model Parameters DESCRIPTION The parametric values in the R-C thermal model have been derived using curve-fitting techniques. R-C values for the electrical circuit in the Foster/tank and Cauer/filter configurations are included. When implemented in P-SPICE, these values have matching characteristic curves to the single-pulse transient thermal impedance curves for the MOSFET. These RC values can be used in the P-SPICE simulation to evaluate the thermal behavior of the MOSFET junction temperature under a defined power profile. These techniques are described in application note AN609, “Thermal Simulation of Power MOSFETs on the P-SPICE Platform”. R-C THERMAL MODEL FOR TANK CONFIGURATION T (Junction) RT1 RT2 RT3 RT4 CT1 CT2 CT3 CT4 T (Ambient) R-C VALUES FOR TANK CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case RT1 11.8123 1.6137 Foot N/A RT2 5.4940 2.6652 N/A RT3 17.7918 929.4000m N/A RT4 44.0492 1.2917 N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case Foot CT1 210.2913m 1.9926m N/A CT2 417.2386u 564.9890u N/A CT3 6.6625m 173.6221u N/A CT4 1.7951 4.9066m N/A Note • n/a indicates not applicable This document is intended as a SPICE modeling guideline and does not constitute a commercial product datasheet. Designers should refer to the appropriate datasheet of the same number for guaranteed specification limits. Revision: 04-Dec-12 1 Document Number: 63203 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 SiA467DJ_RC www.vishay.com Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION T (Junction) RF2 RF1 CF1 RF3 CF2 RF4 T (Ambient) CF4 CF3 GND R-C VALUES FOR FILTER CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case Foot RF1 5.2280 2.4802 N/A RF2 17.8974 3.8546 N/A RF3 12.9358 111.7000m N/A RF4 42.7682 53.5000m N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case CF1 311.8113u 151.6090u Foot N/A CF2 5.0458m 532.1865u N/A CF3 132.7077m 118.7187m N/A CF4 1.5711 1.4556 N/A Note • n/a indicates not applicable Revision: 04-Dec-12 2 Document Number: 63203 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 SiA467DJ_RC www.vishay.com Revision: 04-Dec-12 Vishay Siliconix 3 Document Number: 63203 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000