MM3220 Series

MM3220 series are 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, short, charging, and overcurrent(optional) of the rechargeable one-cell 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.

For 2-cells

1) Range and accuracy of detection / release voltage
●Overcharge detection voltage 4.0V to 4.5V, 5mV steps Accuracy±20mV
●Overcharge release voltage 3.9V to 4.5V, 50mV steps Accuracy±30mV
●Overdischarge detection voltage 2.0V to 3.0V, 50mV steps Accuracy±35mV
●Overdischarge release voltage 2.0V to 3.5V, 50mV steps Accuracy±100mV
●Discharging overcurrent detection voltage 1 +50mV to +300mV, 5mV steps Accuracy±10mV
●Discharging overcurrent detection voltage 2 *1 +50mV to +700mV, 50mV steps Accuracy TYP±20%
●Charging overcurrent detection voltage *1 -300mV to -50mV, 5mV steps Accuracy±20mV
●Short detection voltage 0.9V fixed Accuracy±100mV Accuracy±300mV *2

2) Range of detection delay time
●Overcharge detection delay time Selection from 0.25s, 1.0s, 1.2s, 4.5s
●Overdischarge detection delay time Selection from 20ms, 24ms, 96ms, 125ms, 144ms
●Discharging overcurrent detection delay time 1 Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Discharging overcurrent detection delay time 2 Selection from 0.5ms, 1ms , 1.5ms , 2ms , 4ms
●Charging overcurrent detection delay time Selection from 4ms, 6ms, 8ms, 16ms
●Short detection delay time 400µs fi xed

3) Low current consumption
●Normal mode Typ. 4.0µA, Max. 8.0µA
●Stand-by mode Max. 0.1µA

*1 Optional function
*2 When the discharging overcurrent detection voltage 2 function having

• SOT-26A