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Why is the original power adapter better than the non-original one?TRANSFORMER Production

source:Industry News     Popular:adapter     release time:2022-04-09 09:38:35     Article author:sznbone    

  Why is the original power adapter better than the non-original one?TRANSFORMER Production(图1)

  In theory, the original power adapter is relatively better, but in practice you may not feel the difference. Usually the input voltage allowed by the load has a safe range, such as the nominal value plus or minus 5%. For example, the input requirement of many 2.5-inch hard drives is 5V plus or minus 5%. The same is true for notebooks. If the input voltage is too large or too small, the protection circuit will act and stop working.

  However, before the protection circuit operates, the voltage regulator circuit inside the notebook has been biased to the upper or lower limit of operation, which in principle has a certain impact on the life of the device, but according to the current point of view, the reliability of electronic components is quite good, as long as it is designed Within the range, there will be few problems, and the lifespan will not be shorter than the lifespan of the books, so this is not the main problem.

  The more important problem may be the data security of the notebooks. It is a terrible thing for the computer to stop working suddenly after automatic protection, especially for many friends who do not need batteries. Sometimes inexplicable restarts of the computer are also related to this. For the original power supply, the manufacturer knows what kind of load is to be connected, so the nominal voltage and nominal current of the power supply can be easily calculated.

  The nominal voltage of the power supply should meet the following two conditions: First, when the maximum current is output, the nominal voltage minus the voltage drop of the power supply itself should be greater than 95% of the voltage required by the load. Second, when the minimum current is output, the design voltage minus the voltage drop of the power supply itself should be less than 105% of the voltage required by the load.

  However, if a non-original adapter is used, such as a general-purpose transformer, the above problems cannot be seriously considered. At this time, the user can only try to find a way to obtain compatibility from the power supply parameters. However, the internal resistance of each adapter is different, the allowable error of the nominal voltage may be different, the variation range of the voltage under the nominal current output may also be different, and even the output ripple factor is not necessarily small enough.

  If the relationship between the output power and the output voltage is not carefully measured, there is a certain risk in principle, but this risk is very small, because as long as you choose a power supply with a large enough nominal current, there will be no problem of excessive internal resistance. The wave coefficient can also be reduced by the constant voltage inside the notebook. Therefore, although the original power adapter is indeed better than the non-original one, there is usually no problem in choosing a non-original power supply with a larger output current.


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