AIC1761-CN08 AD [Analog Devices], AIC1761-CN08 Datasheet - Page 11

• Manufacturer Part Number: AIC1761-CN08
• Description: BATTERY CHARGE CONTROLLER
• Manufacturer: AD [Analog Devices]

Fig. 5 Charge Characteristics of NiMH Battery
Both Fig. 5 and Fig. 6 were obtained by using the
AIC1766. Results of similar experiments by using the
AIC1761 are shown in Fig. 7 and Fig.8.
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
1.6
1.5
1.4
1.3
1.2
3.
4.
5.
EXPERIMENTAL RESULTS
Experiments have been conducted to verify the
AIC1761/1766 operation with NiCd and NiMH
battery cells of various brands. Actual results
shown in the following figures clearly indicate that
the negative delta voltage detector and the peak
voltage timer of the AIC1761/1766 have precisely
detected the tiny cell voltage drops or the cell volt-
age peaks and subsequently terminated the fast
charge process after batteries are fully charged.
The battery cell temperatures were all under
safety levels. Note that the fast charge for the
NiMH battery in Fig. 5 is terminated by the peak
voltage timer (0 V ) while the fast charge for the
NiCd battery in Fig. 6 is terminated by the - V
detector.
0
Charge Current = 1A
Cell Capacity = 1000mAH
If the battery charge current is high, say, over
1.5A, quality of circuit board layout and wiring
connection points become increasingly im-
portant in the charger circuit reliability.
Critical components need to meet adequate
rating to prevent heating-up of these compo-
nents from causing circuit malfunction.
Since the AIC1761/1766 is fabricated with
CMOS process, cares must be taken in han-
dling this device to avoid possible damage
from electro-static discharge.
20
Voltage
Charge Time (min.)
40
Temperature
AIC1766
60
AIC1766
80
50
40
30
60
20
Fig. 6 Charge Characteristics of NiCd Battery
Fig. 7 Charge Characteristics of NiMH Battery
Fig. 8 Charge Characteristics of NiCd Battery
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www.analog.com.tw
1.7
1.6
1.5
1.4
1.3
1.6
1.5
1.4
1.3
1.2
1.7
1.6
1.5
1.4
1.3
0
0
0
Charge Current = 1A
Cell Capacity =1000mAH
Charge Current=0.7A
Cell Capacity=700mAH
Charge Current=0.7A
Cell Capacity=700mAH
BATTERY CHARGE CONTROLLER
10
Voltage
20
20
20
Charge Time (min.)
Charge Time (min.)
Charge Time (min.)
Temperature
Voltage
Temperature
Voltage
30
40
Temperature
40
AIC1761/1766
40
SPEC NO: DS-1761-02
50
AIC1761
60
AIC1766
AIC1761
60
60
80
80
70
20
50
40
30
60
20
60
50
40
30
20
60
50
40
30
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