MM4128A/MM4129A Series

The MM4128A / MM4129A series is a double protection IC for 2 cell Li batteries. It detects battery voltage for each cell. The configuration of delay time can be achieved. Output at the time of detection can be held for a fixed period of time; therefore, this can maintain a regular disconnection time of a fuse. In addition, high cell voltage can be dropped and then stopped at the level where battery deterioration does not occur by Electrical discharge function of the IC after disconnecting the fuse.

For 2-cells secondary protection

（1） Range and accuracy of detection and release voltage
　• Overcharge detection voltage 3.6V～5.0V, 5mV Step Accuracy±15mV
　• Overcharge hysteresis voltage 15mV Accuracy±5mV
• Standby detection voltage Selection from 2.5V or 3.5V　Accuracy±300mV

（2） Range of detection delay time
　• Overcharge detection delay time Selection from 300us or 2.4ms or 19.2ms or 153.6ms
　• Overcharge release delay time Selection from 600us or 1.2ms

（3） Range of internal regulator voltage
　• COUT terminal output voltage H 1.8V or 3.3V or 4.7V

（4） Current consumption
　• Current consumption(Vcell=4.0V) Typ. 0.85uA Max. 1.70uA
　• Current consumption at standby(Vcell=2.0V) Typ. 0.15uA Max. 0.30uA

Package

• SSON-6U
• SSON-6V