Si7348DP-RC

Si7348DP_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
37.3485
2.0754
N/A
RT2
13.7941
1.3736
N/A
RT3
13.8301
2.8291
N/A
RT4
5.0273
1.7219
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
2.3146
701.1959 u
N/A
CT2
64.9796 m
347.3899 m
N/A
CT3
1.9252
14.3331 m
N/A
CT4
1.6634 m
29.2564 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: 69205
Revision: 23-Jul-07
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Si7348DP_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
5.5900
2.0543
N/A
RF2
14.8821
622.9000 m
N/A
RF3
21.5847
4.3051
N/A
RF4
27.9432
1.0177
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
1.7943 m
637.2885 u
N/A
CF2
65.7008 m
1.8077 m
N/A
CF3
850.5968 m
8.7971 m
N/A
CF4
1.4993
330.8845 m
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: 69205
Revision: 23-Jul-07
Si7348DP_RC
Vishay Siliconix
Document Number: 69205
Revision: 23-Jul-07
www.vishay.com
3