American Certification ETL Power Adapter

The speed of electronic products is very fast, sometimes after a few updates, the original power adapter can not be found, this time what to power electronic products? Many people think of buying power adapters, but there are many power adapter products on the market, how to choose? For many people, the concept of power adapter only stays in the charger stage, but in fact the power adapter is a kind of transformer, is used in a large number of chargers. People who are unfamiliar with power adapters often need to face the question of which power adapter to use for charging.

The most important concern in choosing a power adapter is matching, most of the power adapters for electronics on the market today, such as tablets, laptops, smartphones, etc. are universal. But there are exceptions, to ensure compatibility, then we can look at the purchase of equipment when the non-original adapter interface, output current and output voltage of the three parameters, to see whether the parameters meet the requirements, if they meet the requirements, then the compatibility is good, we can rest assured that the purchase. In short, the purchase of power adapters must be based on the actual needs of the choice to match the product, if you choose the wrong product, then it will affect the use of performance, and even bring security risks.

Power adapters have a variety of parameters, so you can not use the adapter to charge at will. Before choosing a power adapter, first of all, we have to determine three fit conditions.

First, the interface of the adapter matches the device:

Second, the output voltage must be the same as the rated input voltage of the load (mobile device), or in the voltage range that the load (mobile device) can withstand, otherwise, it may burn the load (mobile device)

Thirdly, the output current of the power adapter should be equal to or greater than the current of the load (mobile device) to provide sufficient power; and

The following is an analysis of the above three fit conditions:

First, mismatched interfaces should never be plugged in without specialized knowledge, or danger will occur.

Second, for why the voltage needs to be consistent, in principle, it is like this - insufficient voltage, not enough to drive the load, the battery can not be charged properly, to put it plainly, the supply does not meet the demand.

Third, as to 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 internal resistance, the greater the loss. Therefore, manufacturers in the production of this adapter will be based on the size of the internal resistance, to determine the no-load output voltage within a certain range, and the voltage threshold corresponding to the current threshold that is the nominal value of the current we see, the greater the nominal value of the current that the adapter with the better the ability to carry load. So choosing an adapter with a slightly higher current will not only not hurt the battery, but will make charging faster.

If you want to know more about switching power supply information, you can consult Xiamen Eahunt Electronics.

Whatsapp:+86 13860786068

Email: athene-cai@eahunt.com

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