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參數資料
| 型號： | AIC1761-CS08 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | BATTERY CHARGE CONTROLLER |
| 中文描述： | 電池充電控制器 |
| 文件頁數： | 7/15頁 |
| 文件大小： | 245K |
| 代理商： | AIC1761-CS08 |
AIC1761/1766
BATTERY CHARGE CONTROLLER
SPEC NO: DS-1761-02
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
7
The AIC1761/1766 constantly monitors the voltage
at VBT pin, which rises as battery cells are being
fast-charged till battery full condition is nearly ap-
proached. The battery temperature is also con-
stantly being sensed to guard against abnormal
temperature situations. VOUT pin will be pulled high
by an external pull-up device and the fast charge
process be switched to trickle charge when one of
the following situations is encountered:
A negative delta voltage (-
V) at VBT pin is de-
tected when compared to its peak value. The
sampling rate of -
V detection is 2seconds/
sample. The detection level of -
V is -1% for the
AIC1761 and -0.25% for the AIC1766.
The battery voltage stays at its peak value for
the duration determined by the peak voltage
timer setting (0
V).
The VBT pin voltage exceeds the “high” battery
voltage protection limit (VCO).
The battery temperature, sensed by the ther-
mistor divider, exceeds the fault temperature
range (TCO).
The selected safety timer period has finished.
TIMER PIN
The TIMER pin can be used as follows to select
one of the preset safety timer period and its cor-
responding periods of initial timer and peak volt-
age timer:
TIMER
Pin
Safety
Timer
Peak Volt-
age Timer
Initial Timer
V
DD
40
min.
2 min.
1.5 min.
GND
80
min.
4 min.
3.0 min.
Floating
160 min.
8 min.
3.0 min.
Power ON
If
0.65V<V
BT
<3.7V
If
α
NTCL>
α
NTC
&
α
NTC>
α
NTCH
-
V detector &
peak voltage timer
start working after
initial period ends.
V
OUT
goes low for
fast charge,
safety timer starts
counting.
-
V detector &
peak voltage timer
working.
V
OUT
goes high for
trickle charge,
safety timer and
-
V detector reset.
V
OUT
goes high for
trickle charge ,
-
V detector reset,
safety timer stops.
If
0.65V<V
BT
<3.7V
If
safety timer period
has finished.
V
OUT
goes high
for trickle charge,
Safety Timer
and
-
V Detector
reset
V
OUT
goes to high, fast charge finished, and trickle charge start.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
V
OUT
goes high
for trickle
charge, -
V
detector reset,
safety timer
stops.
If
α
NTCL>
α
NTC
&
α
NTC>
α
NTCH
If
peak voltage timer
period has finished.
If
-
V decline of VBT
is detected.
Fig. 2 Operation Chart of the AIC1761/1766
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