Si7404DN-RC

Si7404DN_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
4.5197
362.3679 u
N/A
RT2
7.4284
504.3467 m
N/A
RT3
11.8825
972.1139 m
N/A
RT4
56.6379
937.1926 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
6.7430 m
1.9260 m
N/A
CT2
32.7582 m
787.5516 u
N/A
CT3
109.4727 m
18.2079 m
N/A
CT4
1.1804
9.3126 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: 73835
Revision 03-Mar-06
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Si7404DN_RC
Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
R-C VALUES FOR FILTER CONFIGURATION
Thermal Resistance (°C/W)
Foot
Junction to
Ambient
Case
RF1
7.8647
1.8142 m
N/A
RF2
9.3907
670.9463 m
N/A
RF3
10.7274
1.0320
N/A
RF4
52.6417
691.0146 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
6.1206 m
125.4667 u
N/A
CF2
24.0557 m
695.7232 u
N/A
CF3
148.5836 m
6.0783 m
N/A
CF4
1.1181
527.9622 u
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: 73835
Revision 03-Mar-06
Si7404DN_RC
Vishay Siliconix
Document Number: 73835
Revision 03-Mar-06
www.vishay.com
3