MM3734 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

The MM3734 series are voltage monitor ICs for rechargeable lithium-ion or lithium-polymer batteries secondary protection, using a high voltage CMOS process. 1-cell lithium-ion or lithium-polymer battery can be detected overcharge state. Internal circuit is composed of voltage detectors, reference voltage sources, an oscillator, a counter circuit and logical circuits.

For 1 cell secondary protection
1) High-accuracy detection voltage
●Detection voltage 4.0V to 4.5V, 5mV steps Accuracy±20mV,
●Hysteresis voltage 0V to 1.0V, 50mV steps
However, "Detection voltage-Hysteresis voltage<4.0V" is disabled.

2) Range of Detection delay time
●Detection delay time Selectable from 0.25s, 1.02s, 2.048s, 4.096s

3) Low current consumption
●Normal mode Typ. 1.5µA, Max. 3.0µA
●Stand-by mode Max. 0.8µA