The 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. Its working principle is converted from AC input to DC output; press connection The method can be divided into wall type and desktop type. It is widely used in security cameras, set-top boxes, routers, light bars, massagers and other equipment.
There are generally several items on the label of the power adapter (hereinafter referred to as adapter) that need attention. The first is the model of the adapter. For example, the model of this adapter is XVE-120100. It tells us a few pieces of information, including its manufacturer, main parameters, etc. The beginning of XVE is generally ##Company code, 120100 explains this The adapter is 12V1A, 050200 is 5V2A; the second is the INPUT of the adapter, which is generally AC100-240V~50-60Hz in China, which shows that the adapter can work normally under the AC voltage of 100V-240V ; The third is the adapter's OUTPUT (output), DC 12V=1A, which represents a direct 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, for this adapter, voltage 12V*current 1A=12W (power), indicating that the power supply is a 12W adapter.
The power adapter of most notebook computers can be suitable for 100～240V alternating current (50/60Hz). Basically, most notebook computers have an external power supply, and use a power cord to connect to the mainframe, which can reduce the size and weight of the mainframe. Only a few models have the power supply built in the mainframe.
There is a nameplate on the power adapter, which indicates the power, input and output voltage and current and other indicators. Pay special attention to the range of the input voltage. This is the so-called "travel power adapter"
