73655| Datasheet

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Si7892BDP_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 2.0964 9.0489 8.0177 50.6167 Ambient 24.2346 m 558.4598 m 70.7118 m 1.4427 Case 1.3973 m 689.3241 m 1.2370 1.2901 Case 6.0624 m 651.7211 u 17.1391 m 6.2152 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: 73655 Revision 29-Nov-05

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