SUD50P06-15L_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 Foot RT1 N/A 204.6048m N/A RT2 N/A 429.3522m N/A RT3 N/A 390.7889m N/A RT4 N/A 80.7150m N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case Foot CT1 N/A 3.7066m N/A CT2 N/A 103.5817m N/A CT3 N/A 108.7360m N/A CT4 N/A 593.3694m 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: 30-Aug-11 1 Document Number: 73875 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 SUD50P06-15L_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 N/A 208.0792m N/A RF2 N/A 491.5708m N/A RF3 N/A 337.0360m N/A RF4 N/A 70.9322m N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case CF1 N/A 3.0975m Foot N/A CF2 N/A 35.8867m N/A CF3 N/A 44.1610m N/A CF4 N/A 45.8890m N/A Note • n/a indicates not applicable Revision: 30-Aug-11 2 Document Number: 73875 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 SUD50P06-15L_RC www.vishay.com Revision: 30-Aug-11 Vishay Siliconix 3 Document Number: 73875 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