Move to the body of this page
Protection for Lithium-Ion Batteries

MM3722 Series


MM3722 series are Li-ion battery protection IC and detect charge current / discharge current with high precision by current sensing resistor (Rsns). In the One-cell battery pack, on resistance of the FET SW has been used for over-current/short-current detection. MM3722 realize over-current/short-current protection with high accuracy and with no temperature dependence by using a chip resistor.

Product Series

For one-cell


1. Range and accuracy of detection 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 Accuracy+65/-35mV (In case Vdet2=Vrel2)
Accuracy+90/-65mV (In case Vdet2≠Vrel2)
●Discharging overcurrent detection voltage 20mV to 150mV, 1mV step Accuracy±Δ ※1
●Charging overcurrent detection voltage -150mV to -20mV, 1mV step Accuracy±Δ ※1
●Short detection voltage1 40mV to 250mV, 1mV step Accuracy±Δ ※2
●Short detection voltage2 VDD-0.9V Accuracy±300mV
●0V battery charge inhibition battery voltage 1.3V to 1.8V/0.1V step Accuracy±100mV
0.9V Accuracy±300mV

2. Delay time setting
●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)

*1 Accuracy of overcurrent detection voltage

*2 Accuracy of Short detection voltage1


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

Page Top