SiF902EDZ-RC

SiF902EDZ_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
4.0820
343.1000 m
N/A
RT2
12.6407
1.3305
N/A
RT3
10.0717
2.1666
N/A
RT4
49.2056
2.1598
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
428.6982 u
51.6965 m
N/A
CT2
127.3002 m
441.2460 u
N/A
CT3
9.9367 m
7.6265 m
N/A
CT4
1.6547
7.8038 m
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: 69298
Revision: 13-Aug-07
www.vishay.com
1
SiF902EDZ_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
4.8887
1.6136
N/A
RF2
11.8166
2.3565
N/A
RF3
12.6042
1.7781
N/A
RF4
46.6905
251.8000 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
395.9376 u
380.4735 u
N/A
CF2
10.5146 m
3.2480 m
N/A
CF3
141.4110 m
431.6524 u
N/A
CF4
1.5981
354.6075 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: 69298
Revision: 13-Aug-07
SiF902EDZ_RC
Vishay Siliconix
Document Number: 69298
Revision: 13-Aug-07
www.vishay.com
3