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PDF MM1291AF Data sheet ( Hoja de datos )
| Número de pieza | MM1291AF | |
| Descripción | Protection of Lithium Ion Batteries (one cell) | |
| Fabricantes | MITSUMI | |
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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
BF
CF
DF
EF
GF
HF
AW
BW
HW
JW
4.35V 200mV
4.25V 200mV at
Ctd=
* 2.6V 2.4V 2.9V
* 2.6V 2.4V 2.9V
100mV
100mV
4.10V 25mV
**4.35V 25mV 0.082µF
2.6V 2.4V 2.9V
150mV
2.6V 2.4V 2.9V min. 5mS 100mV min. 5mS
No
No
No
No
4.35V 27mV
2.6V 2.4V 2.9V
100mV
**4.225V 27mV min. 0.5S 2.6V 2.4V 2.9V typ. 10mS 100mV typ. 10mS
No
No
*4.35V 200mV
4.25V 270mV typ. 1S
2.6V 2.4V 2.9V
50mV
0.45V
2.3V 2.9V max. 15mS 125mV max. 15mS 0.45V
KF
MW
4.25V 200mV
max. 1.5S
4.30V 270mV
2.3V
2.3V
2.9V
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)
1 page  
MITSUMI
Protection of Lithium Ion Batteries (one cell) MM1291
MM1291AFBE
Absolute Maximum Ratings (Ta=25°C)
Item
Symbol
Rating
Units
Storage temperature
TSTG
-40~+125
°C
Operating temperature
TOPR
-20~+70
°C
Power supply voltage
VCC -0.3~+18
V
VCC-OC pin voltage
VOC -18~0
V
CS pin voltage
VCS -0.6~VCC
V
Allowable loss
PD 300 mV
* The CS pin will not cause abnormal operation when connected to protection resistor RCS (=4.7kΩ)
Electrical Characteristics (Unless otherwise specified Ta=25°C, VCC=VIN=3.5V, VCS=0V, Measurement circuit 1, SW1 : a)
Item
Symbol Measurement Conditions Min. Typ. Max. Units
1 (Normal mode) (IS1=ICC+IIN)
ICC1
VCC=VIN=3.5V
8.0 11.0 µA
Consumption current 2 (Overdischarge mode) IOP2
VCC=VIN=1.9V
0.7 1.0 µA
Ta=-20°C~70°C
Overcharge detection voltage
VALM
VCC=VIN=4.0V 4.5V
4.300 4.350 4.400 V
VOC : L H
Overcharge reset voltage
VALML
VCC=VIN=4.5V 4.0V
VOC : H L
4.050 4.150 4.240 V
Overcharge hysteresis voltage
VALM
VOC-VOCR
150 200 250 mV
Excess discharge detection voltage 1 VS1
VCC=VIN=3.1V 2.0V
VGD : H L, VCS=0V
2.50 2.60 2.70 V
Excess discharge detection voltage 2 VS2
VCC=VIN=3.1V 2.0V
VCS=0.05V, VGD : H L
2.30 2.40 2.50 V
Excess discharge reset voltage
VODR
VCC=VIN=2.0V 3.1V
VGD : L H
2.78 2.90 3.02 V
Starting voltage
VST
VCC=VIN=2.75V
VCS=0V -0.5V, VGD : L H
-0.3 -0.1
V
Overcurrent detection voltage
VCS
VCS=0V 0.12V
VGD : H L
90 100 110 mV
Overcurrent protection release
load release (more than 5 MEG)
Excess discharge detection
non-induction time
*tOD
VCC=VIN=3.0V 2.4V, 1
5.0 10.0 15.0 mS
measurement circuit 2, SW1 : b, SW2 : a
Excessive current detection during
non-induction time
*tOC1
VCS=0V VCS, 1
5.0 10.0 15.0 mS
measurement circuit 2, SW1 : a, SW2 : b
Overcurrent non-induction time
*VCC=VIN=4.0V 4.5V, 1
tALM measurement circuit 2, SW1 : b, SW2 : a 0.5 1.0 1.5 S
CTD=0.082µF
*Operating limit voltage 2
GD pin output voltage H
VOP
VGDH
VCC When VGDL2 > 0.4V
VCC=VIN=3.5V
VCC VCC
-0.3 -0.1
1.2
V
V
GD pin output voltage L1
VGDL1
VCC=VIN=3.5V, VCS=0.5V
0.1 0.3 V
GD pin output voltage L2
VGDL2
VCC=VIN=1.5V
0.2 0.4 V
OC pin output current
IOC VCC=VIN=4.5V, SW1 : b
-30 uA
*1 Refer to input waveforms.
*2 Operation is unstable below the operating limit voltage.
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet MM1291AF.PDF ] | |
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