Power adapter basic common sense

It's sunny today, the power adapter manufacturer small make up to bring the basic knowledge of the power adapter, power adapter, 电源适配器) A small portable electronic devices and electronic power supply power transformation equipment, generally consists of shell, transformer, inductance, capacitance, control components such as IC, PCB, it works by converting ac input dc output; According to the connection mode can be divided into the plug wall and desktop type. Used in security cameras, set-top boxes, routers, article lamp, massager, and other equipment. Power adapter, also called external power supply, a small portable electronic devices and electronic power supply voltage transformation equipment, common in mobile phones, LCD display and laptop computers and other small electronic products. Most of the laptop power adapter can be used for the 100 ~ 240 v alternating current (ac) ( 50/60Hz) 。 Basically, most of the laptops are the external power supply, with a power cord and host connection, so can reduce the volume and weight of the host, only a handful of the electricity supply models built within the host. Have a nameplate on the power adapter, marked on the power, input and output voltage and power flow indicators, such as paying special attention to the range of input voltage, this is the so-called 'travel power adapter,' if a country to the mains voltage is 110 v, this feature is very useful, some of the gray notebook computers are sold only in country of origin, there is no such design is compatible with voltage, even only a single input voltage 110 v, in our country under the voltage of 220 v mains plug in will burn notice, power adapter, Hereinafter referred to as the power supply) The nominal voltage and current is what mean? First of all, the general power supply of the nominal voltage, it is to point to open circuit output voltage, which is not connect any load, outside when no current output voltage, so can also be understood as the voltage is the upper limit of output voltage. For use inside the power supply under the condition of the active voltage components, even if the mains voltage fluctuation, the output is also a constant value, as the market of small transformers, like the walkman with power supply, if the mains fluctuation, the output of the power supply will not then swings. In general ordinary real no-load voltage power adapter does not necessarily completely consistent, and nominal voltage because of the characteristics of electronic components can't completely consistent, so there is a certain error, error is smaller, the higher the consistency requirements for electronic components, the production cost is high, so the price is expensive.