Power adapter is a power supply conversion device.
Power adapter, English name Poweradapter, is a small portable electronic equipment and electronic appliances power supply conversion equipment, generally by the shell, transformer, inductor, capacitor, control IC, PCB board and other components. Its working principle is converted from AC input to DC output, and can be divided into wall-plug type and desktop type according to the connection method. Widely used in security cameras, set-top boxes, routers, light bars, massage instruments and other equipment.
Switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, as well as industrial control equipment, communications equipment, power equipment, instruments, medical equipment, semiconductor refrigeration and heating, air purifiers. As well as electronic refrigerators, LCD monitors, LED lamps and lanterns, audio-visual products, security, computer chassis, digital products and instruments and other fields.
Precautions for use
General power supply nominal voltage, refers to the open-circuit output voltage, that is, the outside is not connected to any load, there is no current output voltage, so it can also be understood that this voltage is the upper limit of the power supply output voltage. 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 and so on with the power supply, if the utility fluctuations, the power supply output will not fluctuate with the fluctuations.
Generally speaking, the real no-load voltage of an 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 error. The smaller the error, the higher the consistency requirements of electronic components, the higher the cost of production, so the price is also more expensive. In addition, regarding the nominal current value, no matter any power supply has a certain internal resistance, so when the power supply output current, it will generate a voltage drop internally, resulting in the generation of heat and lower output voltage.