Si7454DP-RC

Si7454DP_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
2.0964
18.1348 µ
N/A
RT2
9.0489
713.7923 m
N/A
RT3
8.0177
1.3126
N/A
RT4
50.6167
1.1896
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
24.2346 m
81.2397 µ
N/A
CT2
558.4598 m
673.3554 µ
N/A
CT3
70.7118 m
15.6345 m
N/A
CT4
1.4427
6.7185 m
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: 73634
Revision 28-Nov-05
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Si7454DP_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
6.2277
164.8787 m
N/A
RF2
7.9322
888.8177 m
N/A
RF3
7.6428
1.2671
N/A
RF4
47.9015
1.0331
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
16.9231 m
166.0609 µ
N/A
CF2
156.4465 m
357.5156 µ
N/A
CF3
2.8690 m
4.6473 m
N/A
CF4
1.2888
304.1798 µ
N/A
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: 73634
Revision 28-Nov-05
Si7454DP_RC
Vishay Siliconix
Document Number: 73634
Revision 28-Nov-05
www.vishay.com
3