Power adapters are common in everyday life, such as portable mobile phones, lighting LED lights, routers, and frequently used laptops and printers.But a lot of people are confused when choosing a power adapter. Here are three criteria to be followed when choosing a power adapter.
·         Three fit conditions are met
·         1The interface of the adapter matches the device.
·         2The 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 it may burn out the load (mobile device).
·         3The output current of the power adapter should be equal to or greater than the current of the load (mobile device) to provide sufficient power.
·         Principles of interpretation
1# 1 no need to explain, do not interject mismatched interfaces without professional knowledge.
2For reasons of the need for voltage uniformity, the principle is this - the voltage is not high enough to drive the load, and the battery cannot be charged properly, which is to say that demand exceeds supply.
3As for why such a current configuration is needed, it involves the principle of the circuit. As we all know, the power supply has internal resistance, and the greater the internal resistance, the greater the loss.Therefore, when producing this adapter, the manufacturer will determine the no-load output voltage in a certain range according to the magnitude of internal resistance, and the current critical value corresponding to the voltage critical value is the nominal value of current we see. The larger the nominal value of current is, the better the carrying capacity of the adapter will be.So instead of hurting your battery, choosing an adapter with a slightly higher current will make it charge faster.
Pay attention to the matter
Pay attention to the three principles, but this is not absolute, the circuit is full of our daily life, it is helpful to know the basic knowledge of the circuit.
The correct choice of power adapter, the correct use, will not cause damage to electronic equipment, will not shorten the normal service life.

 

SUKI
2019-6-17
 

 声明： Disclaimer: This article comes from individual, KRECO has the right of final interpretation.