What is a power adapter.ac power adapter price

　　I believe everyone is familiar with the power adapter, but many people do not know it very well. In fact, the power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of shell, transformer, inductor, capacitor, control IC, PCB board. and other components.

　　   Its working principle is to convert AC input to DC output; according to the connection method, it can be divided into wall type and desktop type. Widely used in security cameras, set-top boxes, routers, light bars, massagers and other equipment.

　　  Use: Generally speaking, the role of the power adapter is a transformer and a rectifier. Household AC is 220v, and our computer ground is DC 12v. Therefore, it is certain that the power adapter is a transformer-cum-rectifier. Adapters are transformers.

　　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 there is no external load and no current output, so it can also be understood that this voltage is the upper limit of the output voltage of the power supply.

　　In the case of the use of active voltage regulator components inside the power supply, even if the mains voltage fluctuates, the output is a constant value. Like small transformers on the market, such as the power supply equipped with Walkman, if the mains voltage fluctuates, The output of the power supply will not fluctuate accordingly.

　　   Generally speaking, the real no-load voltage of ordinary power adapters is not necessarily exactly the same as the nominal voltage. Because the characteristics of electronic components cannot be completely consistent, there is a certain error. The smaller the error, the higher the consistency requirements for electronic components.

　　  Reference source: Sogou Encyclopedia--Power Adapter Power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of shells, transformers, inductors, capacitors, control ICs, PCB boards and other components.

　　  The role of the power adapter:

　　   Generally speaking, the role of the power adapter is a transformer and a rectifier. Household AC is 220v, and our computer ground is DC 12v. Therefore, it is certain that the power adapter is a transformer-cum-rectifier. Adapters are transformers.

　　   Instructions for using the power adapter:

　　First, it is the model of the adapter. Taking the model XVE-120100 as an example, it tells us several information, that is, its manufacturer, main parameters, etc. The beginning of XVE is generally ##company code, and 120100 means that this adapter is 12V1A, 050200 is 5V2A.

　　   Second, it is the INPUT (input) of the adapter, which is generally AC100-240V~50-60Hz in China, which means that the adapter can work normally under the AC voltage of 100V-240V.

　　   Third, it is the OUTPUT of the adapter, DC 12V=1A, which represents a DC current with a rated voltage of 12V and a maximum current of 1A. Two numbers can quickly calculate the wattage of the adapter. For example, in this adapter, the voltage is 12V*current 1A=12W (power), indicating that the power supply is a 12W adapter.

　　  Reference Source: Baidu Encyclopedia - Power Adapter Power adapter (Power adapter) is a power supply conversion device for small portable electronic equipment and electronic appliances. The function is to supply power. It is an external power supply that integrates a power conversion circuit board, a power cord and a housing.

　　   According to the connection method, the power adapter can be divided into desktop type and wall-mounted type; according to the type of output current, it can be divided into AC output type and DC output type. It is mainly used in small and low-power electronic products such as mobile phones, notebook computers, and beauty instruments.

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