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    ME4068 is a lithium battery charge management chip with constant current and constant voltage charging mode. A single (4.2V) lithium battery can be charged quickly and efficiently. The current mode PWM step-down switch control structure provides a small, simple and efficient solution for fast charging of lithium batteries.

    ME4068 built-in anti-backflow function, so the practical application does not require the input end diode anti-backflow.

    The ME4068 uses an external Sense resistor to set a highly accurate charge current, and an internal divider resistor and a precise reference voltage to set the battery‘s floating charge voltage to a single section (4.2V) with an accuracy of up to ±1%. When the input power is removed, the chip automatically enters low-current sleep mode, and the battery leakage current is as low as 3μA. When the charging cycle is over, if the voltage of a single battery drops to 4.1V, the chip will automatically re-charge the battery. The chip also has the function of charging timing protection, which automatically shuts off after 6 hours of charging.

Input voltage range: 4.7V to 16V

Built-in anti-backfilling function

Built-in input adaptive function

Built-in soft start to prevent large current overshoot at the moment of power-on

High efficiency current mode PWM step-down switch control structure

±10% accuracy of charging current

A fixed switching frequency is used to ensure minimum noise

±1% accuracy of charging voltage

Automatic recharge

Charging timing function 6 hours

When the input power is removed, the system automatically enters hibernation mode

When the battery voltage is low, it automatically enters trickle charging mode

Low ESR ceramic capacitor output stability

Battery temperature detection

Charging equipment

Portable laptop

Handheld device

8-pin ESOP8