Si4800BDY-RC

Si4800BDY_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
10.6072
N/A
594.6719 m
RT2
6.5451
N/A
11.8243
RT3
32.0009
N/A
13.2377
RT4
45.6419
N/A
4.2852
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
815.0453 u
N/A
3.0178 m
CT2
243.5891 m
N/A
7.7403 m
CT3
31.8434 m
N/A
125.8362 m
CT4
1.2519
N/A
497.4729 u
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: 73743
Revision 16-Jan-06
www.vishay.com
1
Si4800BDY_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
8.8589
N/A
4.5817
RF2
6.6722
N/A
4.6315
RF3
35.3515
N/A
7.9983
RF4
43.9584
N/A
12.7469
Junction to
Ambient
Case
Foot
CF1
1.0774 m
N/A
406.6431 u
CF2
4.2314 m
N/A
4.5343 m
CF3
27.5138 m
N/A
1.3059 m
CF4
1.2870
N/A
117.0465 m
Thermal Capacitance (Joules/°C)
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: 73743
Revision 16-Jan-06
Si4800BDY_RC
Vishay Siliconix
Document Number: 73743
Revision 16-Jan-06
www.vishay.com
3