MITSUMI
Protection of Lithium Ion Battery (three cells in series) MM1309
Protection of Lithium Ion Batteries (three cells in series)
Monolithic IC MM1309
Outline
This is a 3-cell series protection IC is for protecting a lithium ion battery from overcharging and excess
discharging. If abnormalities occur during charging and excess voltage is applied, it has a function that turns
off the external FET switch (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.
These functions comprise a protection circuit, with few external parts, for lithium ion batteries.
Features
1.
2.
3.
4.
5.
6.
7.
8.
Current consumption (for V
CC
pin)
Current consumption (for V
CC
pin)
Current consumption (for V
CC
pin)
Current consumption (for V
CC
pin)
Current consumption (for BATH pin)
Current consumption (for BATH pin)
Current consumption (for BATH pin)
Charge prohibit voltage (Ta=-20°C~+70°C)
V
CELL
=4.4V
V
CELL
=4.2V
V
CELL
=3.8V
V
CELL
=2.2V
V
CELL
=4.4V
V
CELL
=3.8V
V
CELL
=2.2V
700µA typ.
300µA typ.
25µA typ.
0.1µA max.
12µA typ.
8µA typ.
1µA typ.
B : 4.35V±50mV
C : 4.25V±50mV
V
CELLU
-45mV
B : 4.20V typ.
C : 4.10V typ.
2.40V±0.09V, 2.35V±0.09V
B : 2.65V±0.16V
C : 2.60V±0.16V
250±75mV
9. Charge prohibit release voltage
10.Charge prohibit detection function operation voltage
11.Excess discharge detection voltage
12.Discharge resumption voltage
13.Excess discharge detection hysteresis voltage
Package
SOP-8C (MM1309 F)
The box represents the rank resulting from the combination of protection functions.
*
Applications
1. Notebook PCs
2. Portable terminals
3. Others
MITSUMI [ MITSUMI ELECTRONICS, CORP. ]
