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參數(shù)資料
| 型號： | AIC1781CN |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Battery Charge Controller |
| 中文描述： | 電池充電控制器 |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 423K |
| 代理商： | AIC1781CN |
AIC1781
12
The calculation for Rx and Ry in the circuit is as
following.
0.29 V
CC
=
)
R
(Ry//
Rx
Ry//R
+
TH
TH
x V
CC
R
TH
=The resistance of thermistor at upper limit of
temperature protection.
0.72 V
CC
=
)
R
(Ry//
Rx
Ry//R
+
TL
TL
x V
CC
R
TL
= The resistance of thermistor at lower limit of
temperature protection.
Substitution and rearranging the equations yield
×
R
R
TL
TH
Rx= 2.061
×
R
R
TL
TH
Ry =
5.3
R
R
R
6.3R
TL
TH
TL
TH
×
×
If temperature characteristic of the thermistor is like
that of SEMITEC 103AT-2, the resistance of Rx and
Ry is tabulated for different TL and TH as below.
(Note: TL is lower temperature limit and TH is upper
temperature limit.)
TABLE. 1 Values of Rx and Ry at TL = 0
°
C
TH (
°
C)
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
Rx(K
)
10.1
9.7
9.4
9.0
8.7
8.4
8.1
7.8
7.5
7.2
7.0
6.8
6.5
6.3
6.1
5.9
Ry (K
)
551.1
300.7
204.8
153.9
122.8
101.8
86.5
75.0
66.0
58.7
52.8
47.8
43.6
39.9
36.8
34.0
66
67
68
69
70
5.7
5.5
5.3
5.2
5.0
31.6
29.5
27.5
25.8
24.3
TABLE. 2 Values of Rx and Ry at TL = -10
°
C
TH (
°
C)
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
Rx (K
)
11.4
11.0
10.6
10.2
9.8
9.5
9.1
8.8
8.5
8.2
7.9
7.6
7.4
7.1
6.9
6.7
6.4
6.2
6.0
5.8
5.6
Ry (K
)
95.6
85.0
76.2
68.9
62.8
57.5
52.9
48.8
45.3
42.1
39.4
36.8
34.6
32.5
30.7
29.0
27.4
26.0
24.6
23.4
22.2
Setting the ADJ Pin Voltage
The slope of
T/
t detection is determined by ADJ
pin voltage of the AIC1781.
The calculation of ADJ pin voltage is shown in the
following procedure followed by an example.
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