參數(shù)資料
型號: NCV4276A
廠商: ON SEMICONDUCTOR
英文描述: 400 mA Low-Drop Voltage Regulator(400mA低壓降穩(wěn)壓器)
中文描述: 400毫安低壓降穩(wěn)壓器(400mA的低壓降穩(wěn)壓器)
文件頁數(shù): 16/23頁
文件大?。?/td> 199K
代理商: NCV4276A
NCV4276, NCV4276A
http://onsemi.com
16
Thermal Model
A discussion of thermal modeling is in the ON Semiconductor web site: http://www.onsemi.com/pub/collateral/BR1487
D.PDF.
Table 1. DPAK 5
Lead Thermal RC Network Models
Drain Copper Area (1 oz thick)
168 mm
2
736 mm
2
168 mm
2
736 mm
2
(SPICE Deck Format)
Cauer Network
Foster Network
168 mm
2
736 mm
2
Units
Tau
Tau
Units
C_C1
Junction
GND
1.00E
06
1.00E
06
W
s/C
1.36E
08
1.361E
08
sec
C_C2
node1
GND
1.00E
05
1.00E
05
W
s/C
7.41E
07
7.411E
07
sec
C_C3
node2
GND
6.00E
05
6.00E
05
W
s/C
1.04E
05
1.029E
05
sec
C_C4
node3
GND
1.00E
04
1.00E
04
W
s/C
3.91E
05
3.737E
05
sec
C_C5
node4
GND
4.36E
04
3.64E
04
W
s/C
1.80E
03
1.376E
03
sec
C_C6
node5
GND
6.77E
02
1.92E
02
W
s/C
3.77E
01
2.851E
02
sec
C_C7
node6
GND
1.51E
01
1.27E
01
W
s/C
3.79E+00
9.475E
01
sec
C_C8
node7
GND
4.80E
01
1.018
W
s/C
2.65E+01
1.173E+01
sec
C_C9
node8
GND
3.740
2.955
W
s/C
8.71E+01
8.59E+01
sec
C_C10
node9
GND
10.322
0.438
W
s/C
sec
168 mm
2
736 mm
2
R’s
R’s
R_R1
Junction
node1
0.015
0.015
C/W
0.0123
0.0123
C/W
R_R2
node1
node2
0.08
0.08
C/W
0.0585
0.0585
C/W
R_R3
node2
node3
0.4
0.4
C/W
0.0304
0.0287
C/W
R_R4
node3
node4
0.2
0.2
C/W
0.3997
0.3772
C/W
R_R5
node4
node5
2.97519
2.6171
C/W
3.115
2.68
C/W
R_R6
node5
node6
8.2971
1.6778
C/W
3.571
1.38
C/W
R_R7
node6
node7
25.9805
7.4246
C/W
12.851
5.92
C/W
R_R8
node7
node8
46.5192
14.9320
C/W
35.471
7.39
C/W
R_R9
node8
node9
17.7808
19.2560
C/W
46.741
28.94
C/W
R_R10
node9
GND
0.1
0.1758
C/W
C/W
NOTE:
Bold face items represent the package without the external thermal system.
Junction
R
1
C
1
C
2
R
2
C
3
R
3
C
n
R
n
Time constants are
not
simple RC products. Amplitudes
of mathematical solution are
not
the resistance values.
Figure 49. Grounded Capacitor Thermal Network (“Cauer” Ladder)
Ambient
(thermal ground)
Junction
R
1
C
1
C
2
R
2
C
3
R
3
C
n
R
n
Each rung is exactly characterized by its RC
product
time constant; amplitudes are the resistances.
Ambient
(thermal ground)
Figure 50. Non
Grounded Capacitor Thermal Ladder (“Foster” Ladder)
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