Laptop use can not be separated from the power transformer, power transformer knowledge but also understands how much? The notebook voltage problems, how to judge? ! Below, Asus EXA0904YH Charger is a matter of common sense speak one by one: First, the nominal voltage and current of the power adapter (hereinafter referred to as the power supply) What does it mean? First, the nominal voltage of the general power supply, refers to the open circuit output voltage, that is, the outside is not connected to any load, and no voltage when the current output, so it can be understood as the upper limit of the power supply output voltage, this voltage. The case of the active regulator element used for the internal Asus A6Jc Ac Adapter, even if the mains voltage fluctuate, and its output is also a constant value, as the market in general small transformers, such as the class with the Walkman power, if the mains fluctuations The output of the power supply will fluctuate. Not necessarily real-load voltage of the common power supply adapter and the nominal voltage is completely consistent, because of the characteristics of electronic components can not be completely consistent, error is smaller, the higher the consistency requirements of the electronic components, the production cost is high , the price will be more expensive. Any power have some internal resistance, so when the Toshiba PA3715U-1ACA Ac Adapter output current when the internally generated voltage drop, resulting in two things, one is to produce heat, so the power will be hot, and the other lead to the output voltage decreases, the equivalent of internal consumption. Second, are of the same nominal voltage power supply, the output current can be used in the same laptop? Supply voltage, output current, and can be used in the same books. The basic principle is that the nominal current of the power supply can replace a small nominal current power. Estimated that someone would think that large nominal current of the power will burn books, because the current big thing. In fact the current much depending on the load in the case of the same voltage. When the notebook high load operation, current books go into standby when the notebook current on small and large nominal current of the power supply has sufficient current margin. Instead, it was replaced with 56w power supply 72w with them no problem, because usually Asus ADP-150NB D Ac Adapter designed to leave a margin, load power must be less than Toshiba PA3714U-1ACA Ac Adapter, so this place in general use feasible power power margin, but the remaining few Once your books picked up a lot of peripherals, such as two USB hard drives, and then the CPU running at full speed, and then there is a base above to drive at full speed to read the disk, and then coupled to charge the battery at the same time, estimated on the dangerous, to feel your power supply is not already boiled eggs out by hand at any time. Best not to use a small current power supply instead of the high-current power supply. Identical machines, the temperature of someone else’s power, I am always very hot, and why? First, check your notebook run, is not like the above said two USB hard CPU running at full speed, hard disk read and write crazy, drive at full speed to read the disk, while charging the battery, placed music loud, screen brightness, wireless network card has been detection signal, and so on, make good use of power management, according to the status of the task reasonable adjustments books work is very important. Power nominal voltage is higher than my laptop battery voltage a lot will not be an accident, right? First of all, you know, the power to the notebook powered with battery to supply of books is different. Battery-powered, Samsung n150 battery output is a pure DC voltage of the battery is neither possible nor necessary to design very high, only about 3.6V, so many batteries are lithium chemical characteristic determines a saving core output voltage is the three series, 10.8V will become a very popular battery voltage. The nominal value of some cells than 3.6V integer multiple of slightly larger, such as 3.7V or 11.2V, etc., in order to protect the battery. Supply, the situation is more complex, you first need to filter added further voltage regulator to ensure stable operation of the power performance is not very good case, the voltage regulator is divided into two parts: a notebook Toshiba PA3469E-1AC3 Ac Adapter , to charge the battery. To that part of the books powered with a battery-powered, the same, and that part of the need to charge the battery only by the charging of the battery control circuit can be added to the batteries, the control circuit can be very complicated, so the power supply voltage must be greater than the electrical The core voltage have a sufficient capacity to supply to the charging control circuit of each unit. Real voltage applied to HP probook 4530s battery will never be the nominal voltage of the power. In addition, we look at the battery charge control circuit including what should be the primary regulator, precision tunable regulator SCR adjustable pulsating output, regulated output current feedback, chip charging process of recording and computing, the charging process self-feedback regulation parameters, and so on, these can consume energy