Si4804BDY-RC

Si4804BDY_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
17.7264
N/A
15.7415
RT2
2.6324
N/A
2.2019
RT3
34.7338
N/A
15.5514
RT4
54.4627
N/A
6.8595
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
4.9531 m
N/A
4.7655 m
CT2
8.9425 m
N/A
426.8169 u
CT3
45.8398 m
N/A
105.9687 m
CT4
1.0431
N/A
89.5748 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: 70365
Revision 19-Mar-07
www.vishay.com
1
Si4804BDY_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
9.9712
N/A
2.8820
RF2
21.3197
N/A
18.2884
RF3
29.0574
N/A
8.7076
RF4
49.2614
N/A
10.4393
Junction to
Ambient
Case
Foot
CF1
2.2098 m
N/A
476.9172 u
CF2
6.5082 m
N/A
4.1262 m
CF3
61.9906 m
N/A
43.2595 m
CF4
1.0971
N/A
69.3897 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: 70365
Revision 19-Mar-07
Si4804BDY_RC
Vishay Siliconix
Document Number: 70365
Revision 19-Mar-07
www.vishay.com
3