MM1291 查看數據表（PDF） - Mitsumi
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MM1291 Datasheet PDF : 7 Pages
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MITSUMI
Protection of Lithium Ion Batteries (one cell) MM1291
Protection of Lithium Ion Batteries (one cell)
Monolithic IC MM1291
Outline
This is a protection IC for one-cell series that protects lithium ion batteries during excess charging,
discharging, or 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 functions for turning off the external FET switch
(overcurrent detection). These function comprise a protection circuit, with few external parts, for lithium ion
batteries.
1-Cell Protection ICs
Overcharge
Package
Overdischarge Release
Overcurrent detection
detection Hysteresis Dead time
Delay
detection voltage
SOP-8 VSOP-8 voltage
Overcurrent Detec time shot-mode
MM1291AF AW
BF BW
CF
DF
EF
GF
HF HW
JW
4.35V 200mV
at
* 2.6V 2.4V 2.9V
100mV
No
4.25V 200mV
* 4.10V 25mV Ctd=
* 0.082µF
2.6V 2.4V 2.9V
100mV
2.6V 2.4V 2.9V
150mV
min. 5mS
min. 5mS
No
No
4.35V 25mV
* 2.6V 2.4V 2.9V
100mV
No
* 4.35V 27mV
2.6V 2.4V 2.9V
100mV
No
min. 0.5S
typ. 10mS
typ. 10mS
4.225V 27mV
* 2.6V 2.4V 2.9V
100mV
No
* 4.35V 200mV
typ. 1S
2.6V 2.4V 2.9V
50mV
0.45V
max. 15mS
max. 15mS
4.25V 270mV
2.3V
2.9V
125mV
0.45V
KF
4.25V 200mV
2.3V
2.9V
MW 4.30V 270mV max. 1.5S
2.3V
2.9V
50mV
125mV
0.9V
0.45V
Note : Under open-load conditions, returns to normal mode from overcurrent mode.
(For MM1291A to G, J, M, 5MΩ or higher; for MM1291H, K, 50MΩ or higher)
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