Si8424DB-RC

Si8424DB_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
14.6277
N/A
1.5684
RT2
12.8596
N/A
14.1563
RT3
6.8283
N/A
869.8000 m
RT4
37.6844
N/A
3.4055
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
7.6334 m
N/A
807.5520 u
CT2
1.3086 m
N/A
1.9868 m
CT3
700.3419 m
N/A
201.1509 m
CT4
1.7891
N/A
8.3824 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: 69520
Revision: 22-Aug-07
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Si8424DB_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
14.3241
N/A
3.7011
RF2
13.5958
N/A
13.3207
RF3
12.1859
N/A
2.5284
RF4
31.8942
N/A
449.8000 m
Junction to
Ambient
Case
Foot
CF1
994.1650 u
N/A
558.4043 u
CF2
5.5673 m
N/A
1.1885 m
CF3
506.5453 m
N/A
960.0394 u
CF4
1.4782
N/A
549.3522 m
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
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Document Number: 69520
Revision: 22-Aug-07
Si8424DB_RC
Vishay Siliconix
Document Number: 69520
Revision: 22-Aug-07
www.vishay.com
3