MM3645 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

MM3645 series are protection ICs for Lithium-ion or Lithium-polymer secondary battery using high voltage CMOS process. They protect the battery pack/system from overcharge, overdischarge, and overcurrent, etc. by controlling FET SW. They realize overcurrent detection with high accuracy and improved temperature dependence by using an external chip resistor. In addition, by using charging off mode, it reduces the off current of system and prevents Lithium-ion battery from discharging when the system is off.

For one-cell
1. Range and accuracy of detection / release voltage
●Overcharge detection voltage 3.6V to 5.0V, 5mV steps Accuracy±20mV
●Overdischarge detection voltage 2.0V to 3.0V, 50mV steps Accuracy±35mV
●Discharging overcurrent detection voltage 20mV to 300mV, 1mV steps Accuracy±15%
●Charging overcurrent detection voltage -300mV to -20mV, 1mV steps Accuracy±15%
●Short detection voltage 0.45V to 0.9V, 50mV steps Accuracy±100mV

2. Range of detection delay time
●Overcharge detection delay time Selection from 0.25s, 0.5s, 1.0s
●Overdischarge detection delay time Selection from 20ms, 24ms, 96ms, 125ms
●Discharging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Charging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Short detection delay time 250µs standard

3. 0V battery charge functionSelection from ”Prohibition” or ”Permission”

4. Forcible discharge OFF mode CNT > VDD-0.4 : DOUT=L Discharge=OFF
CNT < VSS-0.4 : DOUT=H Discharge=ON

5. Low current consumption
●Normal mode Typ. 3.0µA, Max. 5.5µA
●Stand-by mode Max. 0.1µA

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]
MM3645A01VRE	TSOP-8A	Permission	voltage	Latch	voltage	4.430	4.330	2.300	2.300	0.037	-0.0250	0.900	1.000	16.0	125.0	1.0	16.0	1.00	8.0	1.0	0.250
MM3645A02VRE	TSOP-8A	Permission	voltage	Latch	voltage	4.405	4.305	2.500	2.500	0.037	-0.0370	0.900	1.000	16.0	125.0	1.0	16.0	1.00	8.0	1.0	0.250
MM3645B01VRE	TSOP-8A	Prohibition	voltage	Latch	voltage	4.430	4.330	2.400	2.400	0.043	-0.0250	0.900	1.000	16.0	125.0	1.0	16.0	1.00	8.0	1.0	0.250
MM3645B02VRE	TSOP-8A	Prohibition	voltage	Latch	voltage	4.430	4.330	2.400	2.400	0.043	-0.0250	0.600	1.000	16.0	125.0	1.0	16.0	1.00	8.0	1.0	0.250
MM3645E03VRE	TSOP-8A	Permission	voltage	voltage	voltage	4.470	4.270	2.500	2.900	0.049	-0.0310	0.250	1.000	16.0	65.0	1.0	12.0	1.00	8.0	1.0	0.250