Adapter Manufacturer

What is the meaning of nominal voltage and current?

A variety of specifications of the power adapter along with cell phones, tablet and other various electronic devices, also began to appear frequently in our lives, in our daily lives, sometimes we need to use non-original power adapter for charging, at this time, we need to have a certain understanding of the voltage and current of the external marking of the power adapter, or else there is a possibility that you will choose the wrong power supply, which will have an impact on the device.

First of all, the nominal voltage of the power adapter usually refers to the open-circuit output voltage, that is, the voltage value that does not accept any load and has no current output. Therefore it can also be considered as the upper limit of the output voltage of the power supply. For the power supply internal use of active voltage regulator components, even if the utility voltage fluctuations, its output is also a constant value, like the market in general small transformers, such as Walkman with the power supply, if the utility fluctuations, the output of the power supply will not fluctuate.

Generally speaking, the real no-load voltage of the ordinary power adapter is not necessarily the same as the nominal voltage, because the characteristics of the electronic components can not be exactly the same, so there is a certain degree of error, the smaller the error, the higher the consistency of the electronic components required, the higher the cost of production, so the price is also more expensive.

In addition, regarding the nominal current value, no matter any power supply has a certain internal resistance, so when the power supply output current, it will generate a voltage drop internally, resulting in two things, one is to generate heat, so the power supply will be hot, and the other is to lead to a reduction in the output voltage, which is equivalent to internal consumption.

Through the above introduction we can understand that the nominal voltage of the general ordinary power adapter is likely to be with the real no-load voltage is not equal, which is mainly due to the characteristics of the electronic components make the two values can not be completely equal, there must be a certain error between the two, so when using this error should also be taken into account.

EAHUNT power adapter manufacturer adheres to the principle of quality first, each power supply product will undergo 100% aging test, 3 times function detection test, to ensure that the factory pass rate of 100%. Product life can reach 100,000 hours, to meet the 10,000 times plugging and unplugging without failure standard, military quality, trustworthy.