A friend may have a lot of doubts about the first contact with the power adapter, for example, what is the power adapter? Why are some of the electronic products with external plastic shell power adapter, and some are not directly in the production of plastic shell inside the circuit? What is the role of the use of the power adapter? In what case with external power adapter is better? Here are a brief introduction to these questions.

The function of the power adapter is to provide the energy needed for the normal operation of the equipment. Power supply to the equipment. Some external some built-in, and the application of equipment and designers. Because the power adapter is corresponding over temperature protection function. Therefore, the use of power adapter can protect equipment from damage of high temperature, stable and reliable work, also has over current, over voltage, overload protection function, so that equipment does not because of the current and voltage fluctuations and damage. External power adapter use more flexible, as long as the parameters can meet the requirements of the device, you can use the same adapter. But in order to ensure the normal operation of the equipment, select the regular manufacturers must choose the production of power adapter.

External plastic shell power adapter in use also has certain advantages, such as the line can be extended to reduce the energy loss of the line and so on.

Power adapter is a small portable electronic devices and electronic power conversion equipment, is generally composed of a casing, a power transformer and a rectification circuit. According to the input type can be divided into AC power adaptor and DC power adapter; according to the connecting mode can be divided for in wall type power adapter and desktop power adapter. Extensive support in the telephone composite machine, game machine, language repeater, Walkman, notebook computers, cellular phones, etc. equipment.

In the power adapter has a nameplate marked power, input voltage and current output and other indicators, special attention should be paid to the range of input voltage, which is called the & ldquo; travel power adapter & rdquo; if the mains voltage 100V state only. This feature is very useful, some parallel notebook computer is only in the sales of origin, there is no such design, or even only 100V single input voltage, in our country the 220V voltage in will be burned.