Multi-state switching circuit and equipment

Abstract

The invention provides a multi-state switching circuit, which comprises a battery power supply interface used for being externally connected with a battery; a direct current power supply interface used for externally connecting a direct current power supply or a USB power supply device; and a control module, a power supply switching unit and a battery charging unit, wherein the fourth pin and the fifth pin of the control module are connected with the battery charging unit so as to control the battery charging unit to charge a battery, the power supply switching unit is respectively connected with the battery power supply interface and the direct current power supply interface so as to realize switching of power supply modes, and the battery charging unit is connected with the battery power supply interface. The multi-state switching circuit realizes switching among battery power supply, USB power supply and direct-current power supply in equipment, can be compatible with a rechargeable battery and a non-rechargeable battery, and can meet the requirements of different application scenes.

Description

technical field [0001] The invention relates to the technical field of equipment power supply, in particular to a multi-state switching circuit and equipment. Background technique [0002] With the rapid development of electronic technology, various electronic devices composed of integrated circuits, transistors, electronic tubes and other electronic components, which use electronic technology (including) software to play a role, are becoming more and more popular. Generally speaking, most electronic devices rely on electric energy to operate, and there are many ways to power them in actual use, including battery power, USB power and DC power supply. The current equipment generally only uses one method for power supply, but this setting not only has a single power supply method, but also has the following problems: [0003] 1. The DC power supply is powered by municipal power supply facilities, and then the voltage is converted to meet the voltage requirements of the equipm...

AI Technical Summary

Problems solved by technology

The current equipment generally only uses one method for power supply, but this setting not only has a single power supply method, but also has the following problems:

This power supply method requires the device to have a USB interface, and the location is relatively fixed, so it is inconvenient to move. At the same time, the use of USB power supply will increase the power consumption of the computer.

[0005] 3. The battery power supply is to supply power to the device through the battery carried by the device itself, which can be moved, and is generally not restricted by the location and environment. However, due to the limited battery power in this power supply method, the device cannot be powered on when the battery power is exhausted. operate

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