Si3458DV-RC

Si3458DV_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
9.0596
N/A
3.0596
RT2
10.4825
N/A
6.6267
RT3
34.9521
N/A
9.6100
RT4
55.3377
N/A
10.8368
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
1.2529 m
N/A
539.1091 u
CT2
269.9715 m
N/A
8.8348 m
CT3
7.6456 m
N/A
29.9287 m
CT4
1.4475
N/A
5.1893 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: 70425
Revision 28-Mar-07
www.vishay.com
1
Si3458DV_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
13.3612
N/A
4.7109
RF2
26.7090
N/A
10.3187
RF3
15.0058
N/A
10.0952
RF4
54.6176
N/A
4.8760
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
1.1938 m
N/A
548.8720 u
CF2
6.0509 m
N/A
2.2304 m
CF3
62.0085 m
N/A
2.2729 m
CF4
1.3374
N/A
43.4357 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
www.vishay.com
2
Document Number: 70425
Revision 28-Mar-07
Si3458DV_RC
Vishay Siliconix
Document Number: 70425
Revision 28-Mar-07
www.vishay.com
3