In life, power adapters are widely used as daily necessities, such as mobile phones, LED lights that need lighting, routers, laptops and printers that are often used, and so on. However, many people are confused when choosing a power adapter. Let's share three conditions for selecting a power adapter. Meet three adaptation conditions
1. The interface of the adapter matches the device.
2. The output voltage must be the same as the rated input voltage of the load (mobile device), or within the voltage range that the load (mobile device) can withstand, otherwise, the voltage of the load (mobile device) may be burned.
3. The output current of the power adapter shall be equal to and greater than the current of the load (mobile equipment) to provide sufficient power.
Principle interpretation
1. First, there is no need to explain. Do not insert mismatched interfaces without professional knowledge.
2. In principle, the reason why the voltage should be consistent is that the voltage is insufficient to drive the load, and the battery cannot be charged normally. The popular point is that the supply is in short supply.
3. For why such a current configuration is needed, it involves the principle of the circuit. We all know that the power supply has internal resistance. The greater the internal resistance, the greater the loss. Therefore, when producing this adapter, the manufacturer will determine that the no-load output voltage is within a certain range according to the internal resistance, and the current critical value corresponding to the voltage critical value is the nominal value of the current we see. The larger the nominal value of the current, the better the load carrying capacity of the adapter. So you choose an adapter with a slightly higher current, which will not hurt your battery, but will make your charging faster.
matters needing attention
Pay attention to three principles, but this is not absolute. Circuits are full of our daily life. It is helpful to understand basic circuit knowledge.
Select the power adapter correctly and use it correctly, so as not to damage the electronic equipment and shorten the normal service life.
