MITSMI MM1414 Datasheet
MITSUMI
MITSUMI
Protection of Lithium Ion Batteries MM1414
Protection of Lithium Ion Batteries
Monolithic IC MM1414
Outline
This IC is use to protect lithium-ion batteries consisting of three or four cells. It adopts a compact package
and has the functions of previous models, with functions for overcharge detection, overdischarge detection
and overcurrent detection. A dead time can be set externally.
Features
1. Overcharge detection voltage accuracy ±25mV/cell
2. Consumption current (Vcell=4.4V) 50µA typ.
3. Consumption current (Vcell=3.5V) 23µA typ.
4. Consumption current (Vcell=1.8V) 2µA typ.
5. Overcharge sensing dead time: can be set externally
6. PF detection: warning signal when cell voltage falls
Package
TSOP-20A
Applications
IC for protection of lithium-ion batteries consisting of three or four cells
Pin Assignment
1 OV 11 SEL
2 N.C 12 N.C
3 CS 13 CON
20 16 1319 17 15 14 1218 11
13 6824579
TSOP-20A
10
4 N.C 14 N.C
5 DCHG 15 V1
6 N.C 16 V2
7 CDC 17 V3
8 COL 18 V4
9 COV 19 N.C
10 GND 20 V
CC
MITSUMI
MITSUMI
Block Diagram
Protection of Lithium Ion Batteries MM1414
MITSUMI
Pin Description
Protection of Lithium Ion Batteries MM1414
Pin No.
Pin name
I/O Functions
Overcharge detection output pin
NPNTr open collector output
1 OV Output
Normal: high impedance
Overcharge: Low
2 N.C Not connected
Overcurrent detection pin
Monitors load current equivalently by the voltage drop between discharge control
FET source and drain, and makes DCHG pin high when the voltage goes below
3 CS Input
overcurrent detection voltage, turning off discharge control FET. After
overcurrent detection, current flows from this pin and when there is a light load,
overcurrent mode is released. This function does not operate in discharge mode.
4 N.C Not connected
Discharge control FET (P-ch) drive pin
5 DCHG Output Normal: Low
Overdischarge: High
6 N.C Not connected
Overdischarge detection dead time setting pin
7 CDC Input
Dead time can be set by connecting a capacitor between CDC pin and ground.
Overcurrent detection dead time setting pin
8 COL Input
Dead time can be set by connecting a capacitor between COL pin and ground.
9 COV Input
Overcharge detection dead time setting pin
Dead time can be set by connecting a capacitor between COV pin and ground.
10 GND Input Ground pin
3 cell switch pin SEL pin = GND: 3 cell (no V1 cell detection)
11 SEL Input
SEL pin = V
CC: 4 cell
12 N.C Not connected
Discharge FET ON/OFF pin
13 CON Input CON pin low; DCHG pin low
CON pin high; DCHG pin high
14 N.C Not connected
15 V1 Input V1 cell high side voltage input pin
16 V2 Input V2 cell high side voltage and V3 cell low side voltage input pin
17 V3 Input V3 cell high side voltage and V4 cell low side voltage input pin
18 V4 Input V4 cell high side voltage input pin
19 N.C Not connected
20 V
CC Input Power supply input pin
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