First. What do the nominal voltage and current of the power adapter (hereinafter referred to as the power supply) mean? First, the nominal voltage of the general power supply is the output voltage of the guide road, that is to say, the outside does not connect with all the load, no current output voltage at that time, so it can also be understood as the voltage is the limit of the output voltage of the power supply.
For the application of positive voltage regulator components inside the power supply, even if the voltage and voltage have certain fluctuations, the output is stable, like the current market general small transformer, such as mp3 player power supply, if the voltage fluctuations, the output of the power supply is not easy to fluctuate.
Generally speaking, the real full load voltage of the general power adapter is not necessarily consistent with the nominal voltage, because the characteristics of electronic components are unlikely to be completely consistent, so there is a certain deviation, the smaller the deviation, the higher the consistency of electronic components, the higher the cost of manufacturing, so the price is more expensive.
In addition, the nominal current value, regardless of all the power supply often has a certain internal resistance, so when the power output current, it will cause a pressure drop in the internal, resulting in two things, one is to cause heat, so the power supply will be hot, the other is to cause the output voltage reduction, equal to the internal cost.
Two, all are the same nominal voltage power supply, the output current is not the same, can be used in the same book?
The power supply voltage is the same, the output current is not the same, can be used in the same book. The basic criterion is that the power supply with large nominal current can replace the power supply with small nominal current. I guess a lot of people think that a power source that feels high nominal current will burn the book, because the current is high. In fact, the current is more or less the load with the same voltage, hehe hehe, think of elementary school physics. When the book runs for a long time, the current is large, the book into the shutdown of the time, the current is smaller, the power supply with large nominal current has sufficient current capacity. On the contrary, many people use 56w power supply instead of 72w there is no problem, the reason is that the general design of the power adapter set aside a certain capacity, the load output power must be lower than the power supply output power, so this kind of replacement in general application is feasible, but the remaining power supply output capacity is very little, Once your notebook is plugged into a bunch of external devices, such as two usb solid-state drives, followed by a cpu running at full speed, a base with an optical drive on top of it, plus additional battery charging, it's risky to check with your hand to see if your power supply is ready to boil eggs. Therefore, try not to use small current power supply instead of large current power supply.
Three, the same equipment, other people's power supply is warm, mine has been very hot, why?
First do not have to suspect that your power is not good, first look at your book is doing, whether it is like the above two USB solid state disk, CPU running fast, solid state disk crazy reading and writing ability, drive fast read disk, in addition to the battery charge, play songs loudly, display bright, wireless network card has been in the detection of data signals, flexible use of power management methods, It is essential to adjust your work attitude effectively to your daily tasks.
