As the functions of smart devices increase from time to time, their power consumption also starts to get faster and faster. People start to get used to carrying portable chargers or power adapters with them. For many people, the concept of power adapter only stays in the stage of charger, but in fact, power adapter is a kind of transformer that is used in a large number of chargers. People who are not familiar with power adapters often need to face which power adapter to use for charging.
Power adapters have a variety of parameters, so it is not arbitrary to use the adapter for charging. Before choosing a power adapter, first of all, three adaptation conditions should be determined.
First, the adapter's interface matches the device.
Second, the output voltage must be the same as the rated input voltage of the load (mobile device), or in the range of voltage that the load (mobile device) can withstand, otherwise, it may burn the load (mobile device)
Third, the output current of the power adapter should be equal to and greater than the load (mobile device) current to provide sufficient power.
The following is an analysis of the above three adaptation conditions.
The first is that the power adapter should not be plugged in without professional knowledge, otherwise danger will occur.
Second, for why the voltage needs to be consistent, in principle is such a lack of voltage, lack to drive the load, the battery can not be charged properly, to put it plainly, the supply is not enough to meet the demand.
Third, for why the need for such a current configuration, which involves the principle of the circuit, we all know that the power supply is an internal resistance, the greater the loss of internal resistance, the greater the loss. So power adapter manufacturers in the production of this adapter will be based on the size of the internal resistance, to determine the no-load output voltage in a certain range, and the voltage threshold value corresponds to the current threshold value that I see the nominal value of current, the greater the nominal value of current means that the adapter is better with load capacity. So choosing an adapter with a slightly higher current will not only not hurt the battery, but will make charging faster.
This article generally introduces how to choose a power adapter according to your needs, and gives three easier to understand selection conditions, and then the three conditions are explained separately, very suitable for newcomers to read. I hope you can gain something after reading this article.
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