AIC1782 查看數據表（PDF） - Analog Intergrations
零件编号
产品描述 (功能)
比赛名单
AIC1782 Datasheet PDF : 17 Pages
| |||
(d) 0.3V> SEL3
Acceptable ABV/BBV Range:
Before initial timer: 0.16V~2 V
After initial timer:1.2V~2V
Temperature Protection Mode:
If temperature is too high, battery charging
is regarded as completed. If temperature is
too low, function of ∆T / ∆t detection is
disabled, just as thermistor is not existing.
Battery Voltage Measurement
The AIC1782 measures the battery voltage
through ABV and BBV pins, which is connected
to battery positive terminal through a resistor-
divider network, as shown in Fig. 2. The ac-
ceptable limit of divided battery voltage is de-
termined by the input voltage of SEL3 pin.
VBAT
RA
RB
R6
+
100K
C5
C6
ABV/BBV
AIC1782
Fig. 2 Battery Voltage Divider
For SEL3 > (VCC/2) + 0.4V, the suggested di-
vider resistances of RA and RB for the corre-
sponding number of battery cells are as below:
BATTERY
CELLS
2~4
3~6
4~8
5~10
6~12
8~16
RA/RB
2
3.3
4.9
6.4
7.8
10.8
RA (KΩ) RB (KΩ)
240
120
300
91
300
62
300
47
310
39
390
36
AIC1782
For SEL3 < (VCC/2) -0.4V, the suggested divider
resistances of RA and RB for the corresponding
number of battery cells are as below:
BATTERY
CELLS
2
3
4
5
6
8
10
12
16
RA/RB
1
2
3
4
5
7
9
11
15
RA(KΩ) RB (KΩ)
240
240
240
120
240
80
300
75
300
60
360
51
360
40
390
36
410
27
Battery Temperature Measurement
The AIC1782 employs a negative temperature
coefficient (NTC) thermistor to measure the
battery’s temperature. The thermistor is inher-
ently nonlinear with respect to temperature. To
reduce the effect of nonlinearity, a resistor-
divider network in parallel with the thermistor is
recommended. A typical application circuit is
shown in Fig. 3.
VBAT
VCC
Rx
5
VCC
ATS/BTS
C7
AIC1782
Ry
16
GND
Fig. 3 Battery Temperature Sense Circuit
with a Negative Temperature Coef-
ficient (NTC) Thermistor
16
Share Link: 