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參數(shù)資料
| 型號： | AIC1782CS |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Octal buffers and line drivers 20-SOIC 0 to 70 |
| 中文描述： | 雙電池充電控制器 |
| 文件頁數(shù)： | 12/17頁 |
| 文件大小： | 361K |
| 代理商： | AIC1782CS |
AIC1782
17
The calculation for Rx and Ry in the circuit is as
following.
Ry / /R
Rx
(Ry / / R
+
R
TH
= The resistance of thermistor at upper limit
of temperature protection.
Ry / /R
Rx
(Ry / / R
+
R
TL
= The resistance of thermistor at lower limit
of temperature protection.
0.29 Vcc
)
Vcc
TH
TH
=
×
0.72 Vcc
)
Vcc
TH
TL
=
×
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 resis-
tance 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
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
5.7
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
31.6
62
63
64
65
66
67
68
69
70
5.5
5.3
5.2
5.0
29.5
27.5
25.8
24.3
TABLE. 2 Values of Rx and Ry at TL = -10
°
C
TH (
°
C)
Rx (K
)
45
11.4
46
11.0
47
10.6
48
10.2
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
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
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
Setting the ADJ Pin Voltage
The slope of
ADJ pin voltage of the AIC1782.
T /
t detection is determined by
The calculation of ADJ pin voltage is shown in
the following procedure followed by an example.
Procedure
(a)
First, determine the temperature protection
limits TH and TL. Then, substitute TH & TL
into the following equation:
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