參數(shù)資料
型號： NCV7361AD
廠商： ON SEMICONDUCTOR
元件分類： 通用總線功能
英文描述： Voltage Regulator with Integrated LIN Transceiver
中文描述： LINE TRANSCEIVER, PDSO8
封裝： SOIC-8
文件頁數(shù)： 20/28頁
文件大?。?/td> 192K
代理商： NCV7361AD
NCV7361A
http://onsemi.com
20
Table 1. SO8 Thermal RC Network Models*
Copper Area (1 oz thick)
(SPICE Deck Format)
54 mm
2
Cauer Network
54 mm
2
1.08E05
4.10E05
1.13E04
4.42E04
1.74E03
1.39E03
2.08E02
1.08E02
1.14E01
8.11E01
714 mm
2
54 mm
2
Foster Network
Tau
1.00E06
1.00E05
1.00E04
5.00E04
1.00E03
714 mm
2
714 mm
2
1.08E05
4.10E05
1.13E04
4.40E04
1.71E03
1.34E03
1.78E02
9.75E03
1.84E01
3.00E+00
Units
Ws/C
Ws/C
Ws/C
Ws/C
Ws/C
Tau
Units
sec
sec
sec
sec
sec
C_C1
C_C2
C_C3
C_C4
C_C5
C_C6
C_C7
C_C8
C_C9
C_C10
Junction
node1
node2
node3
node4
node5
node6
node7
node8
node9
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
1.00E06
1.00E05
1.00E04
5.00E04
1.00E03
Ws/C
Ws/C
Ws/C
Ws/C
Ws/C
1.00E02
1.00E01
1.00E+00
1.00E+01
5.00E+01
R’s
0.070
0.152
0.481
0.690
0.584
3.223
0.823
1.00E02
1.00E01
1.00E+00
1.00E+01
5.00E+01
R’s
0.070
0.152
0.481
0.690
0.584
3.223
0.823
sec
sec
sec
sec
sec
R_R1
R_R2
R_R3
R_R4
R_R5
R_R6
R_R7
R_R8
R_R9
R_R10
Junction
node1
node2
node3
node4
node5
node6
node7
node8
node9
node1
node2
node3
node4
node5
node6
node7
node8
node9
GND
0.119
0.286
0.857
1.181
1.241
2.574
18.065
27.965
80.896
49.468
0.119
0.286
0.859
1.189
1.276
2.690
21.708
26.035
49.821
15.252
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
26.801
63.710
86.119
35.166
52.538
25.510
C/W
C/W
C/W
*Bold face items in the tables above represent the package without the external thermal system.
The
Cauer
networks
generally
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
have
physical
simulating tools, whereas Foster networks may be more
easily implemented using mathematical tools (for instance,
in a spreadsheet program), according to the following
formula:
R(t)
n
i
1
Ri1et taui
Junction
Ambient
(thermal ground)
R
1
R
2
C
1
C
2
C
3
C
n
R
n
R
3
Time constants are notsimple RC products.
Amplitudes of mathematical solution are notthe resistance values.
Figure 29. Grounded Capacitor Thermal Network (“Cauer” Ladder)
R
2
R
3
Figure 30. NonGrounded Capacitor Thermal Ladder (“Foster” Ladder)
Junction
Ambient
(thermal ground)
R
1
C
1
C
2
C
3
C
n
R
n
Each rung is exactly characterized by its RCproduct time constant; Am-
plitudes are the resistances
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