NCV8184 데이터 시트보기 (PDF) - ON Semiconductor
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NCV8184 Datasheet PDF : 13 Pages
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NCV8184
The Cauer networks generally have physical significance
and may be divided between nodes to separate thermal
behavior due to one portion of the network from another.
The Foster networks, though when sorted by time constant
(as above) bear a rough correlation with the Cauer networks,
are really only convenient mathematical models. Cauer
networks can be easily implemented using circuit simulating
tools, whereas Foster networks may be more easily
implemented using mathematical tools (for instance, in a
spreadsheet program), according to the following formula:
S R(t) + n Ri ǒ1−e−tńtaui Ǔ
i+1
Copper Area (in2)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
160
150
140
130
120
110
100
1.0 oz. Cu
90
80
70
60
50
0
2.0 oz. Cu
100
200
300
400
500
Copper Area (mm2)
600
700
Figure 28. DPAK 5−Lead, qJA as a Function of the Pad Copper Area Including Traces,
Board Material 0.62” Thick FR4
100
50% Duty Cycle
20%
10%
10
5%
2%
1%
1
Non−Normalized Response
0.000001 0.00001
0.0001
0.001
0.01
0.1
1
Pulse Width (s)
10
100
Figure 29. SOIC−8 Thermal Duty Cycle Curves on 1.0 in. Spreader Test Board
1000
http://onsemi.com
10
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