Charging circuit, charging method and a terminal

Abstract

Embodiments of the invention provide a charging circuit, a charging method and a terminal. The charging circuit comprises a normal charging circuit and a standby charging circuit; the normal chargingcircuit is composed of a USB female base, and a common mode inductor, a first switch circuit, a second switch circuit and a charging management chip PMIC which are connected in sequence through a connecting line led out from D+ and D- pins of the USB female base; the standby charging circuit consists of a VBUS contact, a timer and a reverser I0; one end of the VBUS contact is connected with the charging management chip PMIC, and the other end of the VBUS contact comprises a first branch circuit and a second branch circuit; the first branch circuit is connected with the first switch circuit, and the second branch circuit is sequentially connected with the timer, the reverser I0 and the second switch circuit; and when the normal charging circuit breaks down, the VBUS contact of the standby charging circuit inputs a low level, so as to activate the standby charging circuit to charge the terminal, so that the problem that the terminal cannot be temporarily charged after a charging fault occurs in the normal charging circuit is solved.

Description

technical field [0001] The present invention relates to the technical field of charging terminals, and more specifically, to a charging circuit, a charging method and a terminal. Background technique [0002] With the popularization of various smart terminals such as smart phones, and the increasing integration of various smart terminals, the functions carried on smart terminals are becoming more and more abundant and powerful. With the improvement of social media, people have completed most of the video shooting and daily photo shooting through mobile phones. With the popularity of WeChat and other social software, people are also storing some important information on our smart phones. There are also smart wearable devices that are becoming more and more popular. These wearable devices can detect the user's physical condition by monitoring the user's daily activity and various physical signs. With the popularity of these smart devices, the important personal information sto...

AI Technical Summary

Problems solved by technology

[0003]At present, most smart devices are driven by the electric energy stored in their own batteries, and as the functions of smart terminals become more and more abundant, the power consumption of smart terminals The speed is also getting faster and faster, resulting in the need to frequently replenish power for smart terminals. As more and more personal information is stored in smart terminals, this information is becoming more and more important to users. At the same time, due to frequent Sexual charging can easily lead to charging failures in smart terminals. Therefore, there are more and more cases where charging failures occur on smart terminals, causing smart terminals to fail to turn on and resulting in loss of user data. Under such circumstances, it is very important to provide another charging method for smart terminals

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