SI7401DN-RC

Si7401DN_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 RT1 RT2 RT3 RT4 Junction to CT1 CT2 CT3 CT4 Ambient 4.5197 7.4284 11.8825 56.6379 Ambient 6.7430 m 32.7582 m 109.4727 m 1.1804 Case 362.3679 u 504.3467 m 972.1139 m 937.1926 m Case 1.9260 m 787.5516 u 18.2079 m 9.3126 m Foot N/A N/A N/A N/A Foot N/A N/A N/A N/A Thermal Capacitance (Joules/°C) 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: 73834 Revision 03-Mar-06 www.vishay.com 1 Si7401DN_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION R-C VALUES FOR FILTER CONFIGURATION Thermal Resistance (°C/W) Junction to RF1 RF2 RF3 RF4 Junction to CF1 CF2 CF3 CF4 Note: NA indicates not applicable Ambient 7.8647 9.3907 10.7274 52.6417 Ambient 6.1206 m 24.0557 m 148.5836 m 1.1181 Case 1.8142 m 670.9463 m 1.0320 691.0146 m Case 125.4667 u 695.7232 u 6.0783 m 527.9622 u Foot N/A N/A N/A N/A Foot N/A N/A N/A N/A Thermal Capacitance (Joules/°C) 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: 73834 Revision 03-Mar-06 Si7401DN_RC Vishay Siliconix Document Number: 73834 Revision 03-Mar-06 www.vishay.com 3