SI7431DP_RC Datasheet, PDF (1/3 Pages) Vishay Siliconix – R-C Thermal Model Parameters

R-C Thermal Model Parameters
Si7431DP_RC
Vishay Siliconix
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
RT1
10.7022
548.9235 m
RT2
1.5396
66.0800 m
RT3
8.1730
627.5846 m
RT4
44.5852
257.4119 m
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
CT1
637.7248 m
10.0502 m
CT2
18.3411 m
272.6095 u
CT3
63.4993 m
29.5873 m
CT4
1.8487
81.3733 m
Foot
N/A
N/A
N/A
N/A
Foot
N/A
N/A
N/A
N/A
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: 69750
Revision: 05-Oct-07
www.vishay.com
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