Si5479DU-RC

Si5479DU_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)
Foot
Junction to
Ambient
Case
RT1
7.5207
26.3743 m
N/A
RT2
11.0638
203.9247 m
N/A
RT3
12.6090
1.8408
N/A
RT4
58.7691
4.9380
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
769.1519 u
238.1683 u
N/A
CT2
214.0259 m
3.6083 m
N/A
CT3
11.5381 m
283.8532 u
N/A
CT4
1.3933
1.7721 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: 73983
Revision: 20-Jun-07
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Si5479DU_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
10.0999
592.2451 m
N/A
RF2
12.5786
2.1879
N/A
RF3
11.8471
152.2398 m
N/A
RF4
55.3578
4.0525
N/A
Junction to
Ambient
Case
Foot
CF1
881.6825 u
103.2942 u
N/A
CF2
14.7663 m
207.3824 u
N/A
CF3
211.8552 m
1.6241 m
N/A
CF4
1.2197
168.4468 u
N/A
Thermal Capacitance (Joules/°C)
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: 73983
Revision: 20-Jun-07
Si5479DU_RC
Vishay Siliconix
Document Number: 73983
Revision: 20-Jun-07
www.vishay.com
3