Battery charging circuit, battery charging method and electronic equipment

Abstract

The invention discloses a battery charging circuit. The battery charging circuit comprises a power management integrated circuit and a voltage detection chip which is connected with the power management integrated circuit, wherein the voltage detection chip is arranged independently relative to the power management integrated circuit, and used for detecting a voltage of the battery, and feeding back the voltage of the battery to the power management integrated circuit; and the power management integrated circuit is used for receiving the voltage of the battery, and comparing the voltage of the battery with a preset voltage in order to adjust a charging mode of an external power supply for the battery. The invention also discloses a battery charging method and electronic equipment. Through adoption of the battery charging circuit, the battery charging method and the electronic equipment, the voltage of the battery is detected directly through the voltage detection chip which is arranged independently, so that the problem of line impedance during detection of the voltage through the power management integrated circuit is solved; the detected voltage is more accurate; and the charging time of a constant-current charging mode is prolonged relatively. Thus, the charging efficiency is increased, and the battery charging time is shortened.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a battery charging circuit, a charging method and electronic equipment. Background technique [0002] Most of the charging methods of mobile phones adopt the charging method of constant current first and then constant voltage, that is, the constant current charging mode is used at the beginning of charging. At this stage, the charging current remains constant, and the battery voltage gradually increases. When the battery voltage reaches the charging upper limit voltage Then adopt the constant voltage charging mode, the voltage remains unchanged at this stage, and the current gradually decreases. When the current decreases to the minimum current set by the system in the final stage of charging, the charging will stop. During the charging process, the battery voltage is monitored by the Power Management IC (PMIC) in the mobile phone. When the battery voltage reaches the chargin...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a battery charging circuit, charging method and electronic equipment, which can solve the problem that the battery charging time becomes longer due to the high voltage detected by the power management chip

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