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參數(shù)資料
| 型號(hào)： | AIC1783 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Octal buffers and line drivers 20-SOIC 0 to 70 |
| 中文描述： | 電池充電控制器 |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大小： | 159K |
| 代理商： | AIC1783 |
AIC1783
8
The functions and charging states control mentioned
above are illustrated in the function flow chart of
AIC1783 (Fig. 2)
DESIGN GUIDE
Battery Voltage Measurement
The AIC1783 measures the battery voltage through
VBT pin, which is connected to battery positive
terminal through a resistor-divider network, as
shown in Fig. 1
V
BAT
RA
RB
C5
4
μ
F
7
R5
100K
C6
0
μ
F
AIC1783
VBT
+
FIG. 1
Battery Voltage Divider
The suggested divider resistance of RA and RB
for the corresponding number of battery cells are
as below:
BATTERY
CELLS
RA/RB
RA (K
)
RB (K
)
2~4
2
240
120
3~6
3.3
300
91
4~8
4.9
300
62
5~10
6.4
300
47
6~12
7.8
310
39
8~16
10.8
390
36
Setting the Period of Safety Timer
The AIC1783 provides a method for linearly
adjusting the period of safety timer with an external
resistor connected from TIMER pin to GND. The
relation between safety timer length and the
external resistor (R
TIMER
) is shown in Fig. 3. The
table following shows the resistor values for some of
the commonly chosen safety timer periods. Also
shown in the table are their corresponding oscillator
frequencies.
0
100
200
300
400
500
0
200
400
600
800
R
T
(
)
Safety Timer (min.)
Fig. 3 Safety Timer vs. R
TIMER
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