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Protection for Lithium-Ion Batteries

MM3645 Series


MM3645 series are protection ICs for Lithium-ion or Lithium-polymer secondary battery using high voltage CMOS process. They protect the battery pack/system from overcharge, overdischarge, and overcurrent, etc. by controlling FET SW. They realize overcurrent detection with high accuracy and improved temperature dependence by using an external chip resistor. In addition, by using charging off mode, it reduces the off current of system and prevents Lithium-ion battery from discharging when the system is off.

Product Series

For one-cell


1. Range and accuracy of detection / release voltage
●Overcharge detection voltage 3.6V to 5.0V, 5mV steps Accuracy±20mV
●Overdischarge detection voltage 2.0V to 3.0V, 50mV steps Accuracy±35mV
●Discharging overcurrent detection voltage 20mV to 300mV, 1mV steps Accuracy±15%
●Charging overcurrent detection voltage -300mV to -20mV, 1mV steps Accuracy±15%
●Short detection voltage 0.45V to 0.9V, 50mV steps Accuracy±100mV

2. Range of detection delay time
●Overcharge detection delay time Selection from 0.25s, 0.5s, 1.0s
●Overdischarge detection delay time Selection from 20ms, 24ms, 96ms, 125ms
●Discharging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Charging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Short detection delay time 250µs standard

3. 0V battery charge functionSelection from ”Prohibition” or ”Permission”

4. Forcible discharge OFF mode CNT > VDD-0.4 : DOUT=L Discharge=OFF
CNT < VSS-0.4 : DOUT=H Discharge=ON

5. Low current consumption
●Normal mode Typ. 3.0µA, Max. 5.5µA
●Stand-by mode Max. 0.1µA


Package 0V battery
Overcharge release function Overdischarge release function Discharging overcurrent release function Overcharge detection voltage
Overcharge release voltage
Overdischarge detection voltage
Overdischarge release
Discharging overcurrent detection voltage
Charging overcurrent detection voltage
Short detection voltage
Overcharge detection delay time
Overcharge release delay time
Overdischarge detection
delay time
Overdischarge release
delay time
Discharging overcurrent detection delay time
Discharging overcurrent release
delay time
delay time
Charging overcurrent release delay time
Short detection
delay time



Associated Data

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