NEW DATABASE - 350 MILLION DATASHEETS FROM 8500 MANUFACTURERS
NEW DATABASE - 350 MILLION DATASHEETS FROM 8500 MANUFACTURERS
Si4872DY AN609 - Datasheet Archive
Vishay Siliconix R-C Thermal Model Parameters DESCRIPTION The parametric values in the R-C thermal model have been derived using
Si4872DY Si4872DY_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 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 15.1461 N/A 3.3876 RT2 5.1118 N/A 5.6314 RT3 23.4434 N/A 4.3819 RT4 36.3248 N/A 7.6037 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 26.6995 m N/A 7.9366 m CT2 6.0379 m N/A 53.3439 m CT3 188.2129 m N/A 32.8583 m CT4 2.2805 N/A 286.7424 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: 70369 Revision 19-Mar-07 www.vishay.com 1 Si4872DY Si4872DY_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 11.1810 N/A 2.6741 RF2 16.2396 N/A 9.4665 RF3 20.9081 N/A 4.4297 RF4 31.7403 N/A 4.3503 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CF1 6.1678 m N/A 3.3873 m CF2 30.9251 m N/A 9.8076 m CF3 197.2340 m N/A 122.9057 m CF4 2.3731 N/A 142.8755 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: 70369 Revision 19-Mar-07 Si4872DY Si4872DY_RC Vishay Siliconix Document Number: 70369 Revision 19-Mar-07 www.vishay.com 3