Si4860DY-RC

Si4860DY_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
7.1243
N/A
6.0699
RT2
19.2975
N/A
1.3394
RT3
20.1293
N/A
3.6075
RT4
33.2094
N/A
4.9804
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
11.9105 m
N/A
17.0213 m
CT2
1.3676
N/A
12.1561 m
CT3
63.6479 m
N/A
167.9527 m
CT4
3.2613
N/A
551.2294 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: 70367
Revision 19-Mar-07
www.vishay.com
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Si4860DY_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
8.3150
N/A
4.2741
RF2
19.4920
N/A
4.6448
RF3
15.7451
N/A
4.3127
RF4
35.9497
N/A
2.7592
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
9.0905 m
N/A
7.1184 m
CF2
42.7368 m
N/A
12.9760 m
CF3
572.7245 m
N/A
136.0106 m
CF4
1.4671
N/A
756.8259 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: 70367
Revision 19-Mar-07
Si4860DY_RC
Vishay Siliconix
Document Number: 70367
Revision 19-Mar-07
www.vishay.com
3