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參數資料
| 型號： | MM1294 |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | Protection of Lithium Ion Batteries (four cells in series) |
| 中文描述： | 保護鋰離子電池（4個串聯電池） |
| 文件頁數： | 1/6頁 |
| 文件大小： | 169K |
| 代理商： | MM1294 |
MITSUMI
Protection of Lithium Ion Batteries (four cells in series) MM1294
Protection of Lithium Ion Batteries (four cells in series)
Monolithic IC MM1294
Outline
This IC provides protection for lithium ion batteries in the event of overcharging, overdischarging and
overcurrents. When anomalies occur during charging or at other times and excessive voltages are applied,
after a certain time has elapsed for each cell an external FET switch is turned off (overcharging detection); and
in order to prevent overdischarge of the battery during discharge, when the voltage of individual batteries falls
below a fixed voltage, an external FET switch is turned off (overdischarge detection), and the IC is put into
low-consumption current mode. When large currents flow due to a short-circuit or other cause, an external
MOS switch is turned off (overcurrent detection).
Package
SSOP-16
Features
1. Current consumption (overcharging)
2. Current consumption (normal operation)
3. Current consumption (overdischarge)
4. Overcharge detection voltage (
-
20 to +70°C)
5. Overcharge hystereis voltage
6. Overcharge sensing dead time
7. Overcharge sensing operation voltage
8. Overdischarge detection voltage
9. Overdischarge sensing dead time
10.Overcurrent detection voltage
11.Overcharge and overdischarve voltages as well as the overcurrent detection voltage can be changed upon
request.
V
CELL
> V
CELLU
V
CELL
< V
ALM
V
CELL
< V
CELLS
V
CELL
: L H
V
CELL
: H L
C=0.1μF
V
CELL
: L H
V
CELL
: H L
C=0.1μF
170μA typ.
35μA typ.
0.1μA max.
4.25V±50mV/CELL
V
CELLU
-
200mV/CELL typ.
1.0S typ.
4.10V±150mV/CELL
2.40V/CELL typ.
1.0S typ.
0.15V typ.
Applications
Lithium ion battery pack for notebook computers
4-Cell Protection ICs
Rank
Overcharge Overcharge
Overdischarge Overdischarge
Overcurrent At overcurrent
detection voltage hysteresis voltage detection voltage
resume voltage
detection voltage
Overcurrent
release conditions
Load release
300k
or more
detection
A
4.35V±50mV
200mV typ.
2.35V typ.
3.05V typ.
150mV typ.
Pin 3 (DOHG pin) L H
B
C
4.25V±50mV
Same as rank A
200mV typ.
2.40V typ.
Same as rank A
3.10V typ.
Charging reset
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