Power adapter

Abstract

A power adapter comprises a switching power circuit, an input circuit and an output circuit. The switching power circuit is used for converting alternating currents into direct currents, the input circuit and the output circuit are connected with the switching power circuit, the input circuit provides alternating-current output for the switching power circuit, and the output circuit outputs and provides the direct currents of the switching power circuit for loads. The output circuit comprises an output line and an output conversion head, one end of the output line is connected with a switching power source, the other end of the output line is connected with the output conversion head, the output conversion head is in plug connection with the output line, the output conversion head has a voltage conversion function, and the direct-current output of the currents of the switching power source can be converted into voltages needed by the loads.

Description

technical field [0001] The present invention relates to power adapters, and more particularly to power adapters with multiple output voltages. Background technique [0002] Personal digital devices, such as mobile phones, tablet computers, notebook computers, etc., all need their own proprietary power adapters, but this wastes resources and is not easy to carry around. The power adapter in the prior art is generally composed of a power cord, a power adapter body and a DC connection line. In order to adapt to the power input ports of different devices, the DC connection line has an output conversion head for connecting with electrical equipment. The conversion head can be Various forms of interface conversion, but none can provide the function of voltage conversion, especially the adapter power supply of the notebook computer, its output voltage is generally about 19V, after connecting a suitable conversion head, its voltage level is still 19V, not It can charge mobile phone...

AI Technical Summary

Problems solved by technology

[0002] Personal digital devices, such as mobile phones, tablet computers, laptops, etc., all need their own proprietary power adapters, but this wastes resources and is not easy to carry around

The power adapter in the prior art is generally composed of a power cord, a power adapter body and a DC connection line. In order to adapt to the power input ports of different devices, the DC connection line has an output conversion head for connecting with electrical equipment. The conversion head can be Various forms of interface conversion, but none can provide the function of voltage conversion, especially the adapter power supply of the notebook computer, its output voltage is generally about 19V, after connecting a suitable conversion head, its voltage level is still 19V, not Can charge mobile phones or other digital devices with voltage levels

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