96 mm2 767 mm<" />
參數(shù)資料
型號: NCV7356D2G
廠商: ON Semiconductor
文件頁數(shù): 14/24頁
文件大小: 0K
描述: IC TXRX CAN SGL WIRE 14-SOIC
標準包裝: 55
類型: 收發(fā)器
驅動器/接收器數(shù): 1/1
規(guī)程: CAN
電源電壓: 5 V ~ 27 V
安裝類型: 表面貼裝
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 14-SOICN
包裝: 管件
NCV7356
http://onsemi.com
21
Table 2. SOIC14 Thermal RC Network Models*
96 mm2
767 mm2
Copper Area
96 mm2
767 mm2
Copper Area
Cauer Network
Foster Network
C’s
Units
Tau
Units
3.12E05
Ws/C
1.00E06
sec
1.21E04
Ws/C
1.00E05
sec
3.53E04
3.50E04
Ws/C
1.00E04
sec
1.19E03
Ws/C
0.028
0.001
sec
4.86E03
5.05E03
Ws/C
0.001
0.009
sec
2.17E02
7.16E03
Ws/C
0.280
0.047
sec
8.94E02
3.51E02
Ws/C
2.016
0.875
sec
0.304
0.262
Ws/C
16.64
7.53
sec
1.71
2.43
Ws/C
59.47
68.4
sec
411
Ws/C
92.221
sec
R’s
0.041
°C/W
2.44E02
°C/W
0.095
0.096
°C/W
5.28E02
°C/W
0.279
0.281
°C/W
1.67E01
°C/W
1.154
0.995
°C/W
3.5
0.7
°C/W
5.621
6.351
°C/W
0.7
0.1
°C/W
13.180
1.910
°C/W
8.7
5.8
°C/W
23.823
21.397
°C/W
15.9
16.4
°C/W
53.332
27.150
°C/W
31.9
27.1
°C/W
24.794
25.276
°C/W
61.3
29.0
°C/W
0.218
°C/W
4.3
°C/W
*Bold face items in the Cauer network above, represent the package without the external thermal system. The Bold face items in the Foster network
are computed by the square root of time constant R(t) = 24.4 * sqrt(time(sec)). The constant is derived based on the active area of the device
with silicon and epoxy at the interface of the heat generation.
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.
Both Foster and 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:
R(t) +
n
S
i + 1
Ri 1et taui
Junction
Ambient
(thermal ground)
R1
R2
C1
C2
C3
Cn
Rn
R3
Time constants are not simple RC products.
Amplitudes of mathematical solution are not the resistance values.
Figure 20. Grounded Capacitor Thermal Network (“Cauer” Ladder)
Figure 21. NonGrounded Capacitor Thermal Ladder (“Foster” Ladder)
Junction
Ambient
(thermal ground)
R1
R2
C1
C2
C3
Cn
Rn
R3
Each rung is exactly characterized by its RCproduct time constant; Am-
plitudes are the resistances
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