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Protection for Lithium-Ion Batteries

MM3725/MM3726 Series


The MM3725/MM3726 series are protection IC using high voltage CMOS process for overcharge, overdischarge andovercurrent protection of the rechargeable Lithium-ion or Lithium-polymer battery. The overcharge, overdischarge,discharging overcurrent, charging overcurrent, and short protection of the rechargeable one-cell Lithium-ion or Lithium-polymer battery can be detected. Each of these IC composed of four voltage detectors, short detection circuit, referencevoltage sources, oscillator, counter circuit and logical circuits.

Product Series

For one-cell


1. Range and accuracy of detection/release voltage
●Overcharge detection voltage 3.6V to 5.0V, 5mV step Accuracy±20mV
●Overcharge release voltage Vdet1-0.2V to Vdet1, 5mV step Accuracy±30mV
●Overdischarge detection voltage 2.0V to 3.0V, 50mV step Accuracy±35mV
●Overdischarge release voltage 2.0V to 3.0V, 50mV step +50/-35mV (In case Vdet2=Vrel2)
+90/-65mV (In case Vdet2≠Vrel2)
●Discharging overcurrent detection voltage 20mV to 300mV, 1mV step Accuracy±5mV
●Charging overcurrent detection voltage -300mV to -20mV, 1mV step Accuracy±5mV
●Short detection voltage 70mV to 350mV, 1mV step Accuracy±8%
●0V battery charge inhibition battery voltage 1.3V to 1.8V/0.1V step Accuracy±100mV
0.9V Accuracy±300mV

2. Range of detection delay time
●Overcharge detection delay time 256ms to 4.6s
●Overdischarge detection delay time 8ms to 256ms
●Discharging overcurrent detection delay time 8ms to 256ms
●Charging overcurrent detection delay time 6ms to 64ms
●Short detection delay time 250µs to 400µs

3. 0V battery Charge functionSelectable "Permission" or "Inhibition"

4. Current consumption
●Normal mode Typ. 3.0µA, Max. 6.0µA
●Stand-by mode Max. 0.1µA (In case Overdischarge latch function Enable)
Max. 0.6µA (In case Overdischarge latch function Disable)


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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