MM3746 Series

Lithium-Ion Battery protection IC using high voltage CMOS process for overcharge, overdischarge and overcurrent protection of the rechargeable Lithium-ion or Lithium-polymer battery. The overcharge, overdischarge, discharging overcurrent, charging overcurrent, and short protection of the rechargeable Lithium-ion or Lithium-polymer battery can be detected. Each of these IC composed of four voltage detectors, short detection circuit, reference voltage sources, oscillator, counter circuit and logical circuits.

Outline

MM3746 series are protection ICs with charger pump and drive high side N channel FET for Lithium-ion and Lithium-polymer secondary battery. This IC is most suitable for the intelligent battery pack with which I communicate data between the battery pack and the system. And MM3746 series has a temperature detection by using a NTC Thermistor, protects the battery pack and system from over temperature.

For one-cell
1. Range and accuracy of detection/release voltage
●Overcharge detection voltage 4.2V to 4.6V, 5mV step Accuracy±15mV
●Overdischarge detection voltage 2.0V to 3.0V, 50mV step Accuracy±40mV
●Discharging overcurrent detection voltage 10mV to 150mV, 1mV step Accuracy±3.0mV ※1
●Charging overcurrent detection voltage -150mV to -10mV, 1mV step Accuracy±3.0mV ※1
●Short detection voltage 40mV to 300mV, 50mV step Accuracy±5.0mV
●0V battery charge inhibition battery voltage 1.3V fixed Accuracy±100mV
●Temperature detection Tdet 55 to 85℃ Accuracy±5.0℃

2. Temperature detection functionSelectable "Enable" or "Disable"
3. 0V battery Charge functionSelectable "Permission" or "Inhibition"
4. Current consumption (Not include NTC bias current)
●Normal mode Typ. 6.0µA, Max. 10.0µA
●Stand-by mode Max. 0.1µA (Overdischarge latch function Enable)
Max. 1.2µA (Overdischarge latch function Disable)

*1 Accuracy of overcurrent detection voltage

Click the arrow icon in the table below to switch from ascending to descending order.

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Product name	Package	0V battery charge function	Overcharge release function	Overdischarge release function	Discharging overcurrent release function	Overcharge detection voltage [V]	Overcharge release voltage [V]	Overdischarge detection voltage [V]	Overdischarge release voltage [V]	Discharging overcurrent detection voltage [V]	Charging overcurrent detection voltage [V]	Short detection voltage [V]	Overcharge detection delay time [s]	Overcharge release delay time [ms]	Overdischarge detection delay time [ms]	Overdischarge release delay time [ms]	Discharging overcurrent detection delay time [ms]	Discharging overcurrent release delay time [ms]	Charging overcurrent detection delay time [ms]	Charging overcurrent release delay time [ms]	Short detection delay time [ms]
MM3746BB1LBE	WLCSP-10A	Prohibition	voltage	Latch	voltage	4.270	4.170	2.300	2.300	0.013	-0.0100	0.040	1.020	2.0	128.0	1.0	16.0	1.00	8.0	1.0	0.250
MM3746BC1LBE	WLCSP-10A	Prohibition	voltage	Latch	voltage	4.490	4.386	2.900	2.900	0.033	-0.0170	0.140	1.020	2.0	16.0	1.0	16.0	1.00	8.0	1.0	0.250
MM3746DA1LBE	WLCSP-10A	Prohibition	Latch	Latch	voltage	4.445	4.445	2.500	2.500	0.020	-0.0160	0.040	0.512	2.0	128.0	1.0	32.0	1.00	8.0	1.0	0.250