Lithium-Ion Battery ICs
1cell Li-ion/Li-polymer battery protection IC
MM3722 Series
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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.

[Features] (Unless otherwise specified, Topr=+25°C)

1. Range and accuracy of detection voltage

●Overcharge detection voltage 3.6V to 5.0V, 5mV step Accuracy±20mV
(Topr=-20 to +60℃)
●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)
(In case Vdet2≠Vrel2)
●Discharging overcurrent detection voltage 20mV to 150mV, 1mV step Accuracy±Δ (Note1)
●Charging overcurrent detection voltage -150mV to -20mV, 1mV step Accuracy±Δ (Note1)
●Short detection voltage1 40mV to 250mV, 1mV step Accuracy±Δ (Note2)
●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
Note1 : Current detection voltage Accuracy Note2 : Short detection voltage1 Accuracy

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. 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)

4. 0V battery Charge functionSelectable ”Permission” or ”Inhibition”

5. Absolute maximum ratings

●VDD pin VSS-0.3V to +12V
●COUT pin and V- pin VDD-28V to VDD+0.3V
●DOUT pin and CS pin VSS-0.3V to VDD+0.3V
●Storage temperature -55℃ to +125℃
●Operation temperature -40℃ to +85℃


[Pin Assignment]



-Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
-The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.