Si8901EDB-RC

Si8901EDB_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
21.9438
N/A
6.1149
RT2
15.6302
N/A
513.4000 m
RT3
29.5890
N/A
9.1506
RT4
52.8370
N/A
6.2211
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
7.3224 m
N/A
6.8249 m
CT2
3.7009 m
N/A
88.2535 u
CT3
58.1939 m
N/A
4.5171 m
CT4
1.4508
N/A
6.6050 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: 69281
Revision: 08-Aug-07
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Si8901EDB_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
16.6694
N/A
1.5909
RF2
29.3933
N/A
9.3865
RF3
25.0157
N/A
8.6334
RF4
48.9216
N/A
2.3892
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
1.6473 m
N/A
725.9396 u
CF2
4.1504 m
N/A
1.2042 m
CF3
78.9981 m
N/A
264.9627 u
CF4
1.5013
N/A
93.4503 u
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
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Document Number: 69281
Revision: 08-Aug-07
Si8901EDB_RC
Vishay Siliconix
Document Number: 69281
Revision: 08-Aug-07
www.vishay.com
3