Si4482DY-RC

Si4482DY_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
17.0178
N/A
6.6243
RT2
28.0613
N/A
4.6782
RT3
9.4155
N/A
7.5231
RT4
25.5054
N/A
2.1744
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
118.8809 m
N/A
353.7164 m
CT2
2.3931
N/A
18.6846 m
CT3
25.9049 m
N/A
91.4534 m
CT4
3.5206
N/A
21.3292 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: 74678
Revision 08-May-07
www.vishay.com
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Si4482DY_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
12.1238
N/A
1.5044
RF2
17.9102
N/A
7.4671
RF3
40.2587
N/A
10.1929
RF4
9.7073
N/A
1.8356
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
19.5936 m
N/A
7.1379 m
CF2
93.5428 m
N/A
3.2192 m
CF3
1.4446
N/A
89.7423 m
CF4
877.7160 m
N/A
609.3153 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
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Document Number: 74678
Revision 08-May-07
Si4482DY_RC
Vishay Siliconix
Document Number: 74678
Revision 08-May-07
www.vishay.com
3