Overview

The LC05111CMT is a protection IC for 1−cell lithium−ion secondary batteries with integrated power MOSFET. Also it integrates highly accurate detection circuits and detection delay circuits to prevent batteries from over−charging, over−discharging, over−current discharging and over−current charging.

A battery protection system can be made by only LC05111CMT and few external parts.

Features

• Charge−and−discharge Power MOSFET are Integrated at Ta = 25°C, VCC = 4.5 V

♦ ON Resistance (total of charge and discharge) 11.2 mΩ (typ)

• Highly Accurate Detection Voltage/Current at Ta = 25°C, VCC = 3.7 V

♦ Over−charge Detection ±25 mV

♦ Over−discharge Detection ±50 mV

♦ Charge Over−current Detection ±0.7 A

♦ Discharge Over−current Detection ±0.7 A

• Delay Time for Detection and Release (fixed internally)

• Discharge/Charge Over−current Detection is Compensated for Temperature Dependency of Power FET

• 0 V Battery Charging : “Permission”

• Auto Wake−up Function Battery Charging: “Permission”

• Over Charge Detection Voltage : 4.0 V to 4.5 V (5 mV steps)

• Over Charge Release Hysteresis : 0 V to 0.3 V (100 mV steps)

• Over Discharge Detection Voltage : 2.2 V to 2.7 V (50 mV steps)

• Over Discharge Release Hysteresis at Auto Wake−up : 0 V to 0.6 V (200 mV steps)

• Over Discharge Release Hysteresis : 0 V to 0.075 V (25 mV steps)

• Discharge Over Current Detection : 2.0 A to 8.0 A (0.5 A steps)

• Charge Over Current Detection : −8.0 A to −2.0 A (0.5 A steps)

Typical Applications

• Lithium Ion Battery Protection