MM3722AJ4RRE

The MM3722AJ4RRE from MinebeaMitsumi is a dedicated Lithium-Ion Battery Protection IC engineered to safeguard rechargeable Lithium-ion and Lithium-polymer batteries. It provides comprehensive protection against overcharge, overdischarge, discharging overcurrent, charging overcurrent, and short circuits.

This IC features a high-voltage CMOS process and detects charge/discharge currents with high precision using a current sensing resistor. Key electrical specifications include a range of detection voltages for overcharge (3.6V to 5.0V) and overdischarge (2.0V to 3.0V), along with various delay times for different protection events. The device also offers selectable 0V battery charge function (Permission or Inhibition) and exhibits low current consumption in normal mode, typically 3.0µA.

The MM3722 series is designed for one-cell battery packs, offering accurate over-current and short-current protection with minimal temperature dependence by employing a chip resistor. Its internal composition includes four voltage detectors, a short detection circuit, reference voltage sources, an oscillator, a counter circuit, and logical circuits, ensuring robust battery management.

This protection IC is suitable for applications requiring reliable battery safety, such as portable electronics, power tools, and electric vehicles, where precise monitoring and rapid response to fault conditions are critical.