Si4486EY-RC

Si4486EY_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
13.4389
N/A
6.3593
RT2
5.1108
N/A
944.9503 m
RT3
16.7765
N/A
3.3405
RT4
48.9638
N/A
10.3749
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
61.3750 m
N/A
15.0791 m
CT2
11.7026 m
N/A
6.7469 m
CT3
171.8818 m
N/A
877.7676 m
CT4
1.6999
N/A
87.9996 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: 70357
Revision 19-Mar-07
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Si4486EY_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
7.2845
N/A
1.8210
RF2
19.2687
N/A
8.9210
RF3
14.1189
N/A
8.2987
RF4
43.8469
N/A
1.9465
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
9.0889 m
N/A
3.5399 m
CF2
32.1476 m
N/A
12.0117 m
CF3
260.5862 m
N/A
100.2378 m
CF4
1.5615
N/A
471.6705 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: 70357
Revision 19-Mar-07
Si4486EY_RC
Vishay Siliconix
Document Number: 70357
Revision 19-Mar-07
www.vishay.com
3