si4953ady-rc

Si4953ADY_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
20.7160
N/A
17.1389
RT2
5.5506
N/A
3.9724
RT3
27.9011
N/A
9.8622
RT4
55.6595
N/A
8.8776
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
11.7362 m
N/A
2.4908 m
CT2
1.5339 m
N/A
285.8137 u
CT3
60.6292 m
N/A
15.2904 m
CT4
1.3777
N/A
93.4063 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: 70383
Revision 19-Mar-07
www.vishay.com
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Si4953ADY_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
8.0294
N/A
4.5113
RF2
27.9960
N/A
24.0737
RF3
22.8634
N/A
10.5751
RF4
51.2115
N/A
1.2756
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
1.5740 m
N/A
207.0248 u
CF2
9.0222 m
N/A
1.8986 m
CF3
81.6519 m
N/A
41.4354 m
CF4
1.4719
N/A
10.4137
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: 70383
Revision 19-Mar-07
Si4953ADY_RC
Vishay Siliconix
Document Number: 70383
Revision 19-Mar-07
www.vishay.com
3