Power adapter is a small portable electronic equipment and electronic appliances power supply conversion equipment, generally by the shell, power transformer and rectifier circuitry, according to its output type can be divided into AC output type and DC output type; according to the way of connection can be divided into wall and desktop type. Mobile PC because there is no battery, the power adapter is especially important for it.
An adapter is an interface converter, which can be an independent hardware interface device that allows hardware or electronic interfaces to be connected to other hardware or electronic interfaces, or it can be an information interface. Examples include: power adapters, tripod base adapter components, and USB to serial port adapter devices.
Precautions:
First of all, the nominal voltage of the general power supply refers to the voltage of the open-circuit output, that is, the voltage when the outside is not connected to any load and there is no current output, so it can also be understood that this voltage is the upper limit of the output voltage of the power supply.
For the power supply internal use of active voltage regulator components, even if the utility voltage fluctuations, its output is also a constant value, like the market in general small transformers, such as Walkman with the power supply, if the utility fluctuations, the power supply output will not fluctuate.
Generally speaking, the real no-load voltage of the ordinary power adapter is not necessarily the same as the nominal voltage, because the characteristics of the electronic components can not be exactly the same, so there is a certain degree of error, the smaller the error, the higher the consistency of the electronic components required.
