Si5947DU-RC

Si5947DU_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
23.9495
3.2047
N/A
RT2
7.4394
3.6406
N/A
RT3
20.5850
840.6781 m
N/A
RT4
51.8046
4.3986
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
2.7487 m
203.1695 u
N/A
CT2
153.7000 u
3.0822 m
N/A
CT3
48.1399 m
94.0577 m
N/A
CT4
859.7477 m
4.5020 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: 74273
Revision: 27-Jun-07
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Si5947DU_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
7.2873
3.7301
N/A
RF2
25.4282
7.7159
N/A
RF3
21.3216
312.3665 m
N/A
RF4
49.7799
280.0256 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
114.2154 u
172.9052 u
N/A
CF2
2.1753 m
1.8086 m
N/A
CF3
41.1592 m
209.1828 m
N/A
CF4
841.2034 m
5.2915 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: 74273
Revision: 27-Jun-07
Si5947DU_RC
Vishay Siliconix
Document Number: 74273
Revision: 27-Jun-07
www.vishay.com
3