MM1292KF Просмотр технического описания (PDF) - Mitsumi
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MM1292KF Datasheet PDF : 7 Pages
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MITSUMI
Protection of Lithium Ion Batteries (two cells in series) MM1292
Protection of Lithium Ion Batteries (two cells in series)
Monolithic IC MM1292
Outline
This IC is for protecting a lithium ion battery from overcharging, excess discharging, and overcurrent. If
abnormalities occur during charging and excess voltage is applied, it has a function that turns off the external
FET switch when voltage is applied to each battery beyond a specified time (overcharging detection). It also
has a function that turns off the external FET switch when the voltage for each battery falls below a set
voltage, to prevent excess discharge when discharging the battery (discharging detection). At that time, the IC
is switched to low current consumption mode. Also, when there is a large current flow due to shorting or other
reasons, there is a function for turning off the external FET switch (overcurrent detection).
These functions comprise a protection circuit, with few external parts, for lithium ion batteries.
2-Cell Protection ICs
Model name
MM1302A
MM1292C
MM1292D
MM1302E
MM1302F
MM1302G
MM1292H
MM1292J
MM1292K
MM1292L
Overcharge protection
Detection voltage Hysteresis
4.25±0.05V
10mV
4.25±0.05V
200mV
4.35±0.05V
200mV
4.10±0.05V
10mV
4.35±0.05V
10mV
4.215±35V
10mV
4.30±0.05V
220mV
4.25±0.05V
220mV
4.25±0.05V
220mV
4.25±0.05V
220mV
Overdischarge protection
Detection voltage Hysteresis
2.3V±0.1V
700mV
2.4V±0.1V
600mV
2.4V±0.1V
600mV
2.4V±0.1V
600mV
None
2.3V±0.1V
700mV
2.05V±0.1V
950mV
2.4V±0.1V
600mV
2.4V±0.1V
600mV
2.2V±0.1V
800mV
Overcurrent
Detection voltage
220±20mV
150±15mV
150±15mV
150±15mV
None
220±20mV
170±15mV
150±15mV
150±15mV
100±10mV
Features
1. Current consumption (during overcharging)
2. Current consumption (normal)
3. Current consumption (during excess discharging)
4. Current consumption (during excess discharging)
5. Overcharge detection voltage (Ta=-20°C~+70°C)
6. Hysteresis voltage
7. Excess discharge detection voltage
8. Discharge resumption voltage
9. Overcurrent detection voltage
10.Reset after overcurrent detection
11.Operating limit voltage
VCELL=4.5V
VCELL=3.5V
VCELL=1.9V
VCELL=1.0V
80µA typ.
13µA typ.
0.5µA typ.
0.1µA max.
4.25V±50mV (detection for each cell)
200mV±60mV (detection for each cell)
2.4V±0.1V (detection for each cell)
3.0V±0.1V (detection for each cell)
150mV±15mV
load release
0.9V max.
Package
SOP-8C, SOP-8D(MM1292 F)
*The box represents the rank resulting from the combination of protection functions.
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