Lithium battery charger is a charger specially used for charging lithium ion batteries. Lithium-ion batteries have high requirements for chargers and need to protect the circuit. Therefore, lithium battery chargers usually have high control precision and can charge lithium-ion batteries with constant current and constant voltage.

The lithium battery charger has the functions of overvoltage protection and temperature protection. The lithium battery charger is externally connected with a current-limiting charging power supply and P-channel field-effect transistor, which can safely and effectively charge a single lithium battery quickly. Its main feature is that it can still achieve very low power dissipation without using an inductor, using 8-pin μ MAX package. The charging control accuracy is up to 0.75%, which can realize pre-charging. The long charging time is limited to provide secondary protection for the lithium battery. The floating charging mode of the lithium battery charger can make the battery charge to a large capacity.

The lithium battery charger can automatically detect the charging power supply and automatically turn off when there is no power supply to reduce battery leakage. After starting the fast charging, open the external P-type field-effect tube. When the battery voltage reaches the set threshold, enter the pulse charging mode. The opening time of P-channel field-effect tube will be shorter and shorter. When the charging is completed, the LED indicator will flash at a 12% cycle. When the charging power supply and battery are within the normal operating temperature range, inserting the battery will start a charging process; The condition for the end of charging is that the average pulse charging current reaches 1% of the fast charging current, or the time exceeds the preset charging time on the chip.