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 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t 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. MITSUMI 1cell Li-ion/Li-polymer battery protection IC MM3722 Series 1cell Li-ion/Li-polymer battery protection IC MM3722 Series Outline 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. (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 function Selectable ”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°C to +125°C Operation temperature −40°C to + 85°C Features (Unless otherwise specifi ed, Topr=+25°C) (1) Range and accuracy of detection voltage Overcharge detection voltage 3.6V to 5.0V, 5mV step Accuracy±20mV Accuracy±25mV (Topr=−20 to +60°C) 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± (Note1) Charging overcurrent detection voltage −150mV to −20mV, 1mV step Accuracy± (Note1) Short detection voltage1 40mV to 250mV, 1mV step Accuracy± (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 V (mV) 20 30 40 50 60 70 80 90 100 Vdet3, Vdet4 (mV) Vdet3, Vdet4 Accuracy Note2 : Short detection voltage1 Accuracy V (mV) 40 50 60 70 80 90 100 Vshort1 (mV) Vshort1 Accuracy

 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t 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. MITSUMI 1cell Li-ion/Li-polymer battery protection IC MM3722 Series Pin Assignment Top view Pin No. FunctionSSON-6J SON-6C 564 13 2 COUTDOUT V- CSVSS VDD COUTDOUT V- CSVSS VDD

1 Negative power supply voltage input

2 Positive power supply voltage input

3 Current detection terminal

4 Charger negative voltage input

5 Charge FET control terminal

6 Discharge FET control terminal

0V charge prohibition voltage Protection mode latch function Hys-Cancel Discharging overcurrent release range extended function. Overcharge detection voltage [V] Overcharge detection voltage [V] Overdischarge detection voltage [V] Overdischarge detection voltage [V] Discharging overcurrent detection voltage [V] Charging overcurrent detection voltage [V] Short detection voltage [V] Delay time (Note2) Overcharge Overdischarge Discharge overcurrent Overcharge OverdischargeVdet1 Vrel1 Vdet2 Vrel2 Vdet3 Vdet4 Vshort VVVVVVV Please inquire to us, if you need another spec. Note2 : Delay time tVdet1 [s] tVrel1 [ms] tVdet2 [ms] tVrel2 [ms] tVdet3 [ms] tVrel3 [ms] tVdet4 [ms] tVrel4 [ms] tshort [µs]

 Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements withou t 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. MITSUMI 1cell Li-ion/Li-polymer battery protection IC MM3722 Series Application Circuit Symbol Part Min. Typ. Max. Purpose R1 Resistor 100 1k For voltage fl uctuation, For ESD C1 Capacitor 0.01µF 0.1µF 1.0µF For voltage fl uctuation R2 Resistor 1.0k 10k Current limit for charger reverse connection C2 Capacitor 0.1µF For exogenous noise C3 Capacitor 0.1µF For exogenous noise Rsns Resistor 20m Current detection resistance C4 Capacitor 0.1µF For exogenous noise DFET CFET Nch MOS FET Charge and discharge control This typical application circuit and constant value do not guarantee proper operation. Please evaluate thoroughly by actual application to set up constants. COUTDOUT DFETRsns CFET CS VSS VDD Oscillator Delay Short Counter Logic 0V cell Charge Delay Dischargeovercurrent Protectionmoderelease Short2 Rshort Rpu Over charge Over discharge Chargeovercurrent Cell Short1