Charging circuit used for mobile power supply and mobile power supply

Abstract

The invention discloses a charging circuit used for a mobile power supply and a mobile power supply. The charging circuit comprises a charging interface used for receiving an external input power supply, a discharging interface used for external connection with a load, a built-in cell used for storing electric energy, and a detection circuit used for detecting plugging states of the charging interface and the discharging interface. When the detection circuit detects that an input power supply accesses the charging interface, the input power supply is utilized to charge a load connected onto the discharging interface directly, the cell is controlled to stop charging the load. The mobile power supply utilizes an external input power supply to charge a load inserted into the mobile power supply directly when an input power supply is connected, thus the dissipation power of the mobile power supply can be lowered greatly, the heating value of the mobile power supply is lowered, that performances of an electronic device inside the mobile power supply cannot be lowered caused by too high working temperature is ensured, and the working reliability of the mobile power supply is raised.

Description

technical field [0001] The invention belongs to the technical field of charging and discharging circuits, and in particular relates to a circuit design suitable for a charging circuit of a mobile power supply. Background technique [0002] With the increasing popularity of wearable electronic products, their types are becoming more and more diverse, and their functions are becoming more and more diversified, and people use the wearable electronic products more and more frequently. Since wearable electronic products are generally small in size, the space reserved for batteries inside is very limited, and it is impossible to use larger batteries to power such electronic products. Limited by the volume of the battery, the capacity of the battery will not be too large, which will greatly limit the battery life of wearable electronic products and require frequent charging. [0003] In order to facilitate consumers to charge wearable electronic products or other portable digital...

AI Technical Summary

Problems solved by technology

This "charging while discharging" design method will not only lead to a reduction in charging efficiency, but also generate a large power dissipation on the mobile power supply, resulting in serious heating of the mobile power supply.

When the operating temperature of the mobile power supply rises, it will affect the performance of the electronic devices inside the mobile power supply, and the higher the operating temperature, the lower the performance of the electronic devices, which seriously affects the performance and reliability of the mobile power supply.

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