mm1412 Mitsumi Electronics, Corp., mm1412 Datasheet

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mm1412

Manufacturer Part Number
mm1412
Description
Protection For Lithium-ion Batteries
Manufacturer
Mitsumi Electronics, Corp.
Datasheet

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MITSUMI
MITSUMI
Outline
Series Table
Features
Package
This IC protects lithium-ion batteries in the event of overcharge, overdischarge and overcurrent. It has the
following two functions: an overcharge detection function that turns the external FET-SW off when a problem
occurs during charging, etc. and excess voltage is impressed on each battery for longer than a certain time,
and an overdischarge detection function that turns the external FET-SW off when battery voltage drops below
a certain voltage during discharge, in order to prevent battery overdischarge. When these functions operate,
the IC enters low current consumption mode. It also has an overcurrent detection function that turns the FET-
SW off when excess current flows due to a short or the like. Since the functions above are provided, the
protection circuitry for lithium-ion batteries can be comprised with fever external components.
1. Consumption current (during overcharge)
2. Consumption current (normal)
3. Consumption current (during overdischarge)
4. Consumption current (during overdischarge)
5. Overcharge detection voltage (Ta = 0°C ~ 50°C)
6. Hysteresis voltage
7. Overdischarge detection voltage
8. Overdischarge release voltage
9. Overcurrent detection threshold
10. Reset after overcurrent detection
11. Operating limit voltage
VSOP-8A
MM1412
Model
Protection for Lithium-Ion Batteries (2-serial cells)
Monolithic IC MM1412
SOP-8C, E VSOP-8A
EF
Package
Temperature conditions A: Ta=-25 ~ 75°C, B: Ta=-20 ~ 70°C, C: Ta=0 ~ 50°C,
MW
HW
NW
AW
CW
EW
GW
KW
FW
LW
PW
JW
Overcharge
4.350±0.025
4.295±0.025
4.250±0.025
4.250±0.025
4.300±0.025
4.225±0.025
4.250±0.025
4.350±0.025
4.125±0.025
4.125±0.025
4.190±0.025
4.300±0.025
voltage (V)
detection
detection voltage
temperature
Overcharge
conditions
D: Ta=0 ~ 40°C, E: Ta=-20 ~ 25°C
C
C
C
C
C
C
C
C
C
C
C
C
Protection for Lithium-Ion Batteries (2-serial cells) MM1412
V
V
V
V
CELL
CELL
CELL
CELL
= 4.5 R
= 3.5V
= 1.9V
= 1.0V
Overcharge
voltage (V)
hysteresis
detection
OC
220±50
300±50
220±50
220±50
150±50
220±50
220±50
= 270 kΩ 150µA typ.
Overdischarge
15µA typ.
0.5µA typ.
0.1µA max.
4.35 ± 0.025V (detected for each cell)
220mV ± 50mV (detected for each cell)
2.30 ± 0.1V (detected for each cell)
3.50V ± 0.2V (detected for each cell)
150mV ± 15mV
Load open (5MEGΩ or higher)
0.9V max.
voltage (V)
detection
2.3±0.1
2.3±0.1
2.3±0.1
2.0±0.1
2.0±0.1
2.3±0.1
4.5±0.2
2.3±0.1
2.3±0.1
2.0±0.1
2.0±0.1
2.0±0.1
Overdischarge
voltage (V)
3.5±0.2
3.5±0.2
3.5±0.2
3.1±0.2
3.1±0.2
3.5±0.2
3.5±0.2
3.5±0.2
3.1±0.2
3.1±0.2
3.1±0.2
reset
October 22, 1998
voltage (mV)
Overcurrent
detection
150±15
150±15
150±15
150±15
140±15
150±15
150±15
100±15
150±15
100±15
100±15
75±15

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mm1412 Summary of contents

Page 1

... Overcharge detection voltage (Ta = 0°C ~ 50°C) 6. Hysteresis voltage 7. Overdischarge detection voltage 8. Overdischarge release voltage 9. Overcurrent detection threshold 10. Reset after overcurrent detection 11. Operating limit voltage Package VSOP-8A Protection for Lithium-Ion Batteries (2-serial cells) MM1412 D: Ta=0 ~ 40°C, E: Ta=-20 ~ 25°C Overcharge Overcharge Overdischarge detection voltage detection detection temperature ...

Page 2

... MITSUMI MITSUMI Applications 1. Cell phone 2. Movie Pin Assignment VSOP - 8A Block Diagram Protection for Lithium-Ion Batteries (2-serial cells) MM1412 GND ...

Page 3

... Also, this release voltage has a temperature coefficient of -6mV/°C.) (4) Overcurrent mode Voltage between CS and GND exceeds overcurrent detection voltage during discharge. Protection for Lithium-Ion Batteries (2-serial cells) MM1412 Functions ...

Page 4

... MITSUMI Pin Description Pin No. Pin name Equivalent circuit diagram Protection for Lithium-Ion Batteries (2-serial cells) MM1412 Pin No. Pin name Equivalent circuit diagram ...

Page 5

... Protection for Lithium-Ion Batteries (2-serial cells) MM1412 Symbol T STG T OPR V max max max Symbol T OPR V OP (Except where noted otherwise, Ta=25°C) Models listed MM1412A Symbol Measurement conditions V Ta=0°C~50° =1.0V V VH1 =1.9V V VH2 ...

Page 6

... MITSUMI Measuring Circuit Measuring Circuit Measuring Circuit OCH Note : 0. Protection for Lithium-Ion Batteries (2-serial cells) MM1412 , DCH GDH GDL 1V/100µ 1V/100µs 4. 4.0V OC ...

Page 7

... Further, this release voltage has a temperature coefficient of -6mV/°C.) 4) Overcurrent mode The voltage between CS-GND goes above overcurrent detection voltage during discharge. Protection for Lithium-Ion Batteries (2-serial cells) MM1412 Charge sensing Overcharge Overdischarge ...

Page 8

... External capacitance (C Note: Dead time can be calculated according to the following formula: t =5. =Overcharge sensing dead time OC C =External Capacitor···Unit : µF TD The above specifications are representative, and are not guaranteed values. Protection for Lithium-Ion Batteries (2-serial cells) MM1412 0 ...

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