NEW DATABASE - 350 MILLION DATASHEETS FROM 8500 MANUFACTURERS
NEW DATABASE - 350 MILLION DATASHEETS FROM 8500 MANUFACTURERS
SiJ484DP AN609 - Datasheet Archive
Vishay Siliconix R-C Thermal Model Parameters DESCRIPTION The parametric values in the R-C thermal model have been derived using
SiJ484DP SiJ484DP_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. 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 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 T (Ambient) CT4 R-C VALUES FOR TANK CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case Foot RT1 5.4289 854.0973 m N/A RT2 13.0341 2.5508 N/A RT3 9.8361 286.1579 m N/A RT4 41.7009 808.9448 m N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case CT1 4.2420 m 165.1178 m Foot N/A CT2 78.9589 m 20.4956 m N/A CT3 1.6098 1.5316 N/A CT4 1.7074 1.2379 m 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. Document Number: 64836 Revision: 31-Mar-09 www.vishay.com 1 SiJ484DP SiJ484DP_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION T (Junction) RF2 RF1 CF1 CF2 RF3 RF4 T (Ambient) CF4 CF3 GND R-C VALUES FOR FILTER CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case Foot RF1 5.1227 205.3614 m N/A RF2 6.4193 672.5127 m N/A RF3 14.8887 2.7937 N/A RF4 43.5693 828.4259 m N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case Foot CF1 3.8725 m 682.0901 u N/A CF2 32.1954 m 880.7513 u N/A CF3 125.8172 m 14.8703 m N/A CF4 1.2924 151.3200 m N/A Note N/A indicates not applicable www.vishay.com 2 Document Number: 64836 Revision: 31-Mar-09 SiJ484DP SiJ484DP_RC Vishay Siliconix Document Number: 64836 Revision: 31-Mar-09 www.vishay.com 3