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AC DC Power Adapter Using The Matters Needing Attention

I. AC DC Power Adapter What does the nominal voltage and current of the AC DC power adapter mean? First, the general AC DC power adapter nominal voltage, refers to the open output voltage, that is, outside of no load, no current output voltage, so it can also be understood that this voltage is the AC DC power adapter output voltage ceiling.

AC DC Power Adapter For the AC DC power adapter to use the active voltage regulator of the components in the case, even if the mains voltage fluctuations, its output is also constant value, like the market on the general small transformers, such as Walkman, such as AC DC power adapter, if the mains fluctuation, the AC DC power adapter output will not fluctuate.

AC DC Power Adapter Generally speaking, AC DC power adapter is not the real no-load voltage is not necessarily consistent with the nominal voltage, because the characteristics of electronic components can not be completely consistent, so there is a certain error, the smaller the error, the higher the consistency of the electronic components requirements, the cost of production is higher, so the price is more expensive.

AC DC Power Adapter In addition, on the nominal current value, no matter any AC DC power adapter has a certain internal resistance, so when the AC DC power adapter output current, will be in the internal pressure drop, resulting in two things, one is to generate heat, so AC DC power adapter will be hot, the other is to reduce the output voltage, equivalent to internal consumption.

AC DC Power Adapter Two, are the same nominal voltage AC DC power adapter, the output current is different, can be used in the same notebook?

AC DC power adapter voltage, the output current is different, can be used on the same notebook. The basic principle is that a large nominal current AC DC power adapter can replace a small nominal current AC DC power adapter. It is estimated that someone will think that the AC DC power adapter with a large nominal current will burn the notebook because the current is large. In fact, the current in the same voltage, depending on the load, hehe, think of the physics of junior middle school know.

AC DC Power Adapter When the notebook is running high load, the current is bigger, the notebook enters standby, the current is smaller, the large nominal current AC DC power adapter has enough current allowance. Conversely, some people use 56w AC DC power adapter to replace 72w with no problem, because the AC DC power adapter is usually designed to leave a certain margin, load power is less than AC DC power adapter power, so this substitution is feasible in general use, but the remaining AC DC power adapter power allowance is rarely, once you have a lot of peripherals, such as two USB hard disk, then the CPU is running at full speed, there is a base, above to a CD-ROM drive full speed reading, coupled with the battery charging at the same time, estimated at risk, to feel free hand to touch your AC DC power adapter is not ready to boil eggs. Therefore, it is best not to use a small current AC DC power adapter instead of large current AC DC power adapter.

AC DC Power Adapter Three, identical machine, others AC DC power adapter temperature, I always very hot, why?

Do not suspect your AC DC power adapter has a problem, first look at what your notebook is doing, is not like the above two USB hard disk, CPU full speed running, hard drive crazy read and write, CD-ROM drive full speed reading, while charging the battery, loud music, the largest screen brightness, wireless card has been detecting signal, etc., use AC DC power adapter management, according to the task of reasonable adjustment of the working state of the notebook is very important.

4, AC DC power adapter nominal voltage than my laptop battery voltage is much higher, will not have an accident?

First of all, to know, AC DC power adapter to the laptop power supply and battery power is different.

AC DC Power Adapter Battery power, the battery output is pure DC, very clean, the battery voltage is neither possible nor need to design very high, lithium batteries chemical properties determine the output voltage of a power core can only be around 3.6V, so many batteries are using a three-level series, 10.8V is also a popular battery voltage. Some batteries are slightly larger than 3.6V, such as 3.7V or 11.2V, and so on, in fact, to protect the batteries.

AC DC power Adapter power supply, the situation is more complex, the first need to add a further voltage regulator filter to ensure that AC DC power adapter performance is not very good, stable work, the voltage after the regulator is divided into two parts, all the way to the work of the power supply, the other way to charge the battery, the power supply of the same part of the battery time, and the battery charging that part of the battery need to pass the control circuit can be added to the core, the control circuit can be very complex, Therefore the AC DC power adapter voltage must be greater than the core voltage to provide sufficient capacity for the charging control circuit unit. The last voltage that is really added to the core will never be the nominal voltage of your AC DC power adapter. Be assured.


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