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參數(shù)資料
| 型號： | MM1292L |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | Protection of Lithium Ion Batteries (two cells in series) |
| 中文描述： | 保護鋰離子電池（2串聯(lián)電池） |
| 文件頁數(shù)： | 5/7頁 |
| 文件大小： | 190K |
| 代理商： | MM1292L |
MITSUMI
Protection of Lithium Ion Batteries (two cells in series) MM1292
Electrical Characteristics
(unless otherwise specified, Ta=25°C)
Item
Symbol
I
VH
1
I
VH
2
I
VH
3
I
VH
4
I
VL
V
ALM
V
AL
V
S
V
DF
V
ST
V
GDH
V
GDL
I
OCH
V
CS
Measurement Conditions
V
CELL
=4.5V, R
OC
=270k
V
CELL
=3.5V (normal)
V
CELL
=1.9V (During excess discharge)
V
CELL
=1.0V (During excess discharge)
V
H
=V
L
Ta=
-
20°C~70°C
V
AL
=V
ALMH
-
V
ALML
Min. Typ. Max. Units
80
13.0
0.5
Current consumption 1
Current consumption 2
Current consumption 3
Current consumption 4
VL pin input voltage
Overcurrent detection voltage
Hysteresis voltage
Overcharge detection voltage
Discharge resumption voltage
Starting voltage
GD pin output voltage H
GD pin output voltage L
OC pin output current
Overcurrent detection voltage
Reset by overcurrent
Overcurrent detection delay 1
Overcurrent detection delay 2
Excess discharge detection delay
TC pin charge current
100
20.0
0.8
0.1
0.3
4.30
260
2.50
3.10
μA
μA
μA
μA
μA
V
mV
V
V
V
V
V
μA
mV
-
0.3
4.20
140
2.30
2.90
0
4.25
200
2.40
3.00
Discharge resumed through voltage rise
Voltage applied between GND-CS pins
-
0.6
-
0.5
V
CELL
=3.5V, I
L
=10μA
V
CELL
=3.5V, I
L
=10μA, V
CS
=1V
V
CELL
=4.5V
VH
-
0.3 VH
-
0.2
0.2
150
150
load release
20
30
20
50
0.3
20
135
165
T
OC
1
T
OC
2
T
OD
I
TC
1
10
mS
μS
mS
nA
between CS-GND pins > 0.8V
100
10
30
80
TC pin threshold value
V
TC
V
CELL
=4.5V, V
TC
=0 5V
V
OC
=L H
C
TC
=0.012μF
3.65
3.90
4.15
V
Non-induction time for overcharge
Operating limit voltage
T
OC
V
OPL
0.5
1.0
1.5
0.9
S
V
Note 1. For current consumption, it is assumed that high side cell voltage and low side cell voltage are
identical. When the cell voltages differ, it is set by the higher voltage.
2. GD pin are high impedance when the current consumption is below the operating limit voltage.
3. When the circuit configuration calls for discharge resumption through charging, the discharge
resumption voltage is 2.4V typ.
Description of Operation
[Outline]
This IC is used for protecting lithium ion batteries (two cell series connection type). Overcharge detection,
excess discharge detection, and overcurrent detection are built into each circuit. It controls the FET for
discharge control and charge control (external N-MOS FET). There are four major operating modes.
1. Overcharge mode
When the voltage between Vh-VI and VI-GND exceeds the overcharge voltage (V
ALM
).
2. Normal mode
When the voltage between Vh-VI and VI-GND exceeds the excess discharge voltage (V
S
) and is less
than the over charge voltage (V
ALM
).
3. Excess discharge mode
When the voltage between Vh-VI and VI-GND is less than the excess discharge voltage (V
S
).
4. Overcurrent mode
When the voltage between CS-GND is less than the overcurrent voltage (V
CS
).
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