Si4346DY-RC

Si4346DY_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
10.8265
N/A
1.5271
RT2
27.9865
N/A
9.8875
RT3
27.1895
N/A
11.3544
RT4
29.0443
N/A
4.1856
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
1.2218 m
N/A
460.8589 µ
CT2
34.6844 m
N/A
7.5559 m
CT3
1.7620
N/A
104.8735 m
CT4
2.6514
N/A
893.7954 µ
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: 74084
Revision 29-Aug-05
www.vishay.com
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Si4346DY_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
10.1229
N/A
6.1153
RF2
29.9305
N/A
10.4867
RF3
31.6783
N/A
9.9682
RF4
23.0782
N/A
327.4199 m
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
569.6012 µ
N/A
407.4008 µ
CF2
30.2683 m
N/A
6.1887 m
CF3
916.3560 m
N/A
104.4619 m
CF4
856.5287 m
N/A
26.4625 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: 74084
Revision 29-Aug-05
Si4346DY_RC
Vishay Siliconix
Document Number: 74084
Revision 29-Aug-05
www.vishay.com
3