NCV4275ADT33RKG 查看數據表（PDF） - ON Semiconductor
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NCV4275ADT33RKG Datasheet PDF : 19 Pages
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NCV4275A
Table 2. D2PAK 5−Lead Thermal RC Network Models
Drain Copper Area (1 oz thick)
241 mm2
788 mm2
(SPICE Deck Format)
Cauer Network
241 mm2
653 mm2
Units
C_C1 Junction Gnd
1.00E−06
1.00E−06
W−s/C
C_C2 node1
Gnd
1.00E−05
1.00E−05
W−s/C
C_C3 node2
Gnd
6.00E−05
6.00E−05
W−s/C
C_C4 node3
Gnd
1.00E−04
1.00E−04
W−s/C
C_C5 node4
Gnd
2.82E−04
2.87E−04
W−s/C
C_C6 node5
Gnd
5.58E−03
5.95E−03
W−s/C
C_C7 node6
Gnd
4.25E−01
4.61E−01
W−s/C
C_C8 node7
Gnd
9.22E−01
2.05
W−s/C
C_C9 node8
Gnd
1.73
4.88
W−s/C
C_C10 node9
Gnd
7.12
241 mm2
1.31
653 mm2
W−s/C
R_R1 Junction node1
0.015
0.0150
C/W
R_R2 node1 node2
0.08
0.0800
C/W
R_R3 node2 node3
0.4
0.4000
C/W
R_R4 node3 node4
0.2
0.2000
C/W
R_R5 node4 node5
1.85638
1.8839
C/W
R_R6 node5 node6
1.23672
1.2272
C/W
R_R7 node6 node7
9.81541
5.3383
C/W
R_R8 node7 node8
33.1868
18.9591
C/W
R_R9 node8 node9
27.0263
13.3369
C/W
R_R10 node9
gnd
1.13944
0.1191
C/W
NOTE: Bold face items represent the package without the external thermal system.
241 mm2
788 mm2
Foster Network
Tau
Tau
1.361E−08
1.361E−08
7.411E−07
7.411E−07
1.005E−05
1.007E−05
3.460E−05
3.480E−05
7.868E−04
8.107E−04
7.431E−03
7.830E−03
2.786E+00
2.012E+00
2.014E+01
2.601E+01
1.134E+02
1.218E+02
R’s
0.0123
0.0585
0.0257
0.3413
1.77
1.54
4.13
6.27
60.80
R’s
0.0123
0.0585
0.0260
0.3438
1.81
1.52
3.46
5.03
29.30
Units
sec
sec
sec
sec
sec
sec
sec
sec
sec
sec
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
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:
n
S R(t) + i + 1 Ri ǒ1−e−tńtaui Ǔ
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