si5904dc-rc

Si5904DC_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
28.8997
N/A
22.9528
RT2
7.3047
N/A
5.9111
RT3
20.9223
N/A
1.7928
RT4
52.5607
N/A
9.9214
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
1.4667 m
N/A
980.9062 u
CT2
165.3221 u
N/A
168.5356 u
CT3
32.4158 m
N/A
2.5381
CT4
1.3579
N/A
13.6418 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: 74023
Revision: 27-Jun-07
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Si5904DC_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
9.9324
N/A
5.3124
RF2
28.9353
N/A
16.3119
RF3
19.4955
N/A
14.0691
RF4
51.4401
N/A
4.0773
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
170.1651 u
N/A
105.4782 u
CF2
1.3594 m
N/A
549.2108 u
CF3
32.6863 m
N/A
1.7158 m
CF4
1.3801
N/A
70.8657 m
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: 74023
Revision: 27-Jun-07
Si5904DC_RC
Vishay Siliconix
Document Number: 74023
Revision: 27-Jun-07
www.vishay.com
3