NCV8184 ON Semiconductor, NCV8184 Datasheet - Page 10

• Manufacturer Part Number: NCV8184
• Description: Micropower 70ma Low Dropout Tracking Regulator/line Driver
• Manufacturer: ON Semiconductor

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
The Cauer networks generally have physical significance
160
150
140
130
120
100
110
0.000001
100
90
80
70
60
50
10
1
0
0
2%
1%
20%
50% Duty Cycle
5%
10%
Figure 28. DPAK 5-Lead, qJA as a Function of the Pad Copper Area Including Traces,
0.1
0.00001
Figure 29. SOIC-8 Thermal Duty Cycle Curves on 1.0 in. Spreader Test Board
100
Non-Normalized Response
0.2
0.0001
0.3
200
0.001
Board Material 0.62” Thick FR4
0.4
http://onsemi.com
2.0 oz. Cu
Copper Area (mm
Copper Area (in
300
0.01
NCV8184
0.5
Pulse Width (s)
10
tools, whereas Foster networks may be more easily
implemented using mathematical tools (for instance, in a
spreadsheet program), according to the following formula:
1.0 oz. Cu
2
0.6
)
2
0.1
)
400
0.7
R(t) +
1
500
i + 1
S
0.8
n
R i 1-e -t tau i
10
0.9
600
100
1
1000
1.1
700