SiA911DJ-RC

SiA911DJ_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
27.8444
13.5384 u
N/A
RT2
13.2763
5.8442
N/A
RT3
24.6832
5.9340
N/A
RT4
42.5995
4.1781
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
2.1767 m
33.2234 n
N/A
CT2
98.0538 u
455.1145 u
N/A
CT3
36.5093 m
54.7731 u
N/A
CT4
1.0064
483.2881 u
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: 70411
Revision 22-Mar-07
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SiA911DJ_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
13.8391
8.7738
N/A
RF2
30.8093
3.8432
N/A
RF3
23.0844
1.7166
N/A
RF4
40.6974
1.6357
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
87.5026 u
45.4628 u
N/A
CF2
1.9177 m
196.9508 u
N/A
CF3
38.5977 m
383.0453 u
N/A
CF4
1.0048
98.0426 u
N/A
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: 70411
Revision 22-Mar-07
SiA911DJ_RC
Vishay Siliconix
Document Number: 70411
Revision 22-Mar-07
www.vishay.com
3