SiA917DJ-RC

SiA917DJ_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
12.4956
764.1000 m
N/A
RT2
27.7856
5.6063
N/A
RT3
26.5938
5.7425
N/A
RT4
43.1250
3.8871
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
90.5075 u
5.0483 m
N/A
CT2
1.9927 m
452.2021 u
N/A
CT3
34.1260 m
54.4164 u
N/A
CT4
1.1120
486.1773 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: 74693
Revision: 09-May-07
www.vishay.com
1
SiA917DJ_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
14.2316
8.6635
N/A
RF2
31.2018
4.0091
N/A
RF3
23.4768
1.6771
N/A
RF4
41.0898
1.6503
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
92.1040 u
43.9117 u
N/A
CF2
2.0224 m
226.4934 u
N/A
CF3
41.6061 m
229.4698 u
N/A
CF4
1.1219
103.4306 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
www.vishay.com
2
Document Number: 74693
Revision: 09-May-07
SiA917DJ_RC
Vishay Siliconix
Document Number: 74693
Revision: 09-May-07
www.vishay.com
3