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.

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)

• SSON-6J
• SSON-6M
• SON-6C