Si4336DY_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 2.1646 N/A 201.8765 m RT2 22.7237 N/A 4.1319 RT3 31.7971 N/A 6.6634 RT4 23.2083 N/A 4.9648 Thermal Capacitance (Joules/°C) Junction to Ambient Case Foot CT1 20.8422 m N/A 20.0324 m CT2 47.2729 m N/A 164.0744 m CT3 2.0384 N/A 260.0244 m CT4 3.7242 N/A 14.8759 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: 73818 Revision 02-Mar-06 www.vishay.com 1 Si4336DY_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 3.7499 N/A 4.7845 RF2 22.2239 N/A 3.9192 RF3 32.9041 N/A 6.5486 RF4 21.1242 N/A 754.8537 m Junction to Ambient Case Foot CF1 12.2646 m N/A 10.3342 m CF2 32.9132 m N/A 32.2002 m CF3 1.1221 N/A 127.3103 m CF4 1.2290 N/A 3.8073 Thermal Capacitance (Joules/°C) 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: 73818 Revision 02-Mar-06 Si4336DY_RC Vishay Siliconix Document Number: 73818 Revision 02-Mar-06 www.vishay.com 3