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OEM Lenovo power adapter be universal?

2019-08-31

In this era of electricity, various electrical appliances have been widely used. Therefore, a variety of power adapters have also appeared in large numbers. This small, portable device that can supply power is also available in large numbers. Although it is relatively small compared to various appliances, it is not possible in people's lives. lack. Can the Lenovo computer's Power Adapter be universal? What is the impact of the Lenovo power adapter voltage and current?

The Lenovo power adapter can be used as long as it is plugged in. Also pay attention to the output voltage and current on the adapter. If the difference is large, it can only be used for a short period of time. If it is the same, it can be completely replaced.

How do you look at the voltage and current?

First of all, the nominal voltage of the general Power Supply refers to the voltage of the open circuit output, that is, the voltage when no external load is connected and there is no current output, so it can be understood that this voltage is the upper limit of the power supply output voltage.

In the case where an active voltage regulator is used inside the power supply, even if the mains voltage fluctuates, its output is a constant value. Like a small transformer on the market, such as a power supply with a Walkman, if the mains fluctuates, The output of this power supply will also fluctuate accordingly.

Generally speaking, the true no-load voltage of a common power adapter is not necessarily the same as the nominal voltage. Because the characteristics of electronic components cannot be completely consistent, there is a certain error. The smaller the error, the higher the consistency requirement for electronic components. The cost of production is high, so the price is more expensive.

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

Therefore, the voltage and current of the Lenovo power adapter can be used in common. Everyone can use it with confidence~

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