MM3645 Series

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

• TSOP-8A