Power adapters have two type, AC output type and DC output type, which can be divided into wall mounted type and desktop type according to the connection mode.
Power adapter is widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial equipment, communication equipment, electrical equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifier, electronic refrigerator, liquid crystal display, LED lighting, communication equipment, audio-visual products, security, computer chassis, the field of digital products and other instruments which are very important in many fields.
What does the power adapter play in those fields? Power adapter space generally is built-in, general adapter volume is not small, small volume of the machine are external, in order to save space, and the replacement is convenient, power adapter, a relatively high voltage, placed inside the machine is dangerous.
Most of the laptop power adapters can be suitable for the input of 100V to 240V alternating current (50/60Hz). Basically, most laptop computers use the power cord to connect with the host outside the power supply, which can reduce the volume and weight of the host, and only a few of them are built into the host computer.
There is a nameplate on the power adapter,which the input and output voltage and the amount of current are indicated, especially the range of the input voltage.