The function of the power adapter

By authorswitching power supply,Switching Power Supply manufacturer,,AC DC power adapter,Cable,Power Bank,LED Power Supply,China 2017/7/11 11:20:13   
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      The power adapter is also called the external power supply (switch power adapter), it is the power supply voltage conversion device of a small portable electronic equipment and electronic appliances, this is because in real life, electronic devices are often not directly use household power, because the use of home is the power supply voltage 220 volts, and electronic products generally generally required supply voltage is 5 volts to 20 volts. Therefore, the role of the power adapter is critical (module power). With it, we can use these electronic products conveniently and safely. Well, what is the role of power adapter? For this problem, Xiao Bian through collecting and collating data, and carried out a brief summary.

Constitution and application of power adapter (operation principle of power adapter)

The power adapter is common in small electronic products such as mobile phones, liquid crystal displays and notebook computers. Generally composed of shell, power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type. According to the connection mode, it can be divided into plug wall type and desktop type. It is widely used in telephone, computer player, game player, language repeater, Walkman, notebook computer, cellular phone and so on.

Power adapter for computer

The 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, and in these fields has a role can not be ignored. So what are the functions of the power adapter?

The role of the power adapter

Generally speaking, the function of the power adapter is the transformer and the rectifier. Home alternating current is 220V, and our computer land is DC 12V (as if), so we can be sure that the power adapter is transformer and rectifier. The adapter is the transformer, then we should know, through the exchange of 220V transformer, the rectifier DC, here is the consumption, and consumption of these will be transformed into heat, so the power adapter will heat is normal. Transformer is made of silicon steel sheet, the transformer is energized, resulting in magnetic flux, magnetic flux will lead to silicon steel between the role of force, resulting in buzzing sound, which is normal. But the sound of the earth is not normal, there are many reasons: 1, AC voltage instability. 2, chip damage. 3, turn to turn short circuit. 4, components damage, and so on. By the way, the adapter's function is to convert AC to direct current electronic products

The power adapter is usually built in a large space, the 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

Several problems needing attention in use of power adapter

In the power adapter (hereinafter referred to as adapter) label, there are usually several items need to pay attention to.

First, is the type of adapter, for example, a adapter model is XVE-120100, it tells us some information, it is the manufacturers, Watts, XVE at the beginning of the general is the ## company code, 120100 is that the adapter is 12W, 050200 is 10W;

Second, adapter INPUT (input), in China, the general is 100-240V~50-60Hz, which shows that this adapter can work under the voltage of 100V-240V;

Third, is the adapter OUTPUT (output), the two figures can quickly calculate the adapter watts, such as the adapter, voltage, 12V*, current 1A=12W (power), indicating that the power supply is 12W adapter.

Most laptop power adapters are suitable for use with 100 to 240V alternating current (50/60Hz). Basically, most laptops run out of power and connect to a mainframe with a power cord that reduces the size and weight of the host. Only a handful of models put the power into the mainframe.

There is a nameplate in the power adapter, marked power, index input and output voltage and current, with particular attention to the range of input voltage, this is the so-called "Travel Adapter", if the voltage is only 110V of the state, this feature is very useful, some smuggled goods notebook computer it is only at the origin of sales, not the compatible voltage design, single input voltage or even only 110V, plug will in 220V voltage in China under fire.



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