MITSUMI
Protection of Lithium Ion Batteries MM1414
Protection of Lithium Ion Batteries
Monolithic IC MM1414
Outline
T...
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 2 3 20 19 18 17 16 15 14 13 12 11 4 5 1 2 3 4 5 6 7 8 9 10 TSOP-20A 6 7 8 9 10 OV N.C CS N.C DCHG N.C CDC COL COV GND 11 12 13 14 15 16 17 18 19 20 SEL N.C CON N.C V1 V2 V3 V4 N.C VCC
MITSUMI
Protection of Lithium Ion Batteries MM1414
Block Diagram
MITSUMI
Protection of Lithium Ion Batteries MM1414
Pin Description
Pin No. Pin name I/O Overcharge detection output pin 1 OV Output
NPNTr open collector 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 3 CS Input FET source and drain, and makes DCHG pin high when the voltage goes belo...