First, power adapter (hereinafter referred to as the power) of the nominal voltage and current is what does this mean? First, the nominal general power supply voltage is the open circuit output voltage is not connected to any outside load when no current output voltage, it can also be understood to limit this voltage is the power supply output voltage.For HP Envy X2 Laptop AC Adapter
For the case of a power regulator’s internal use of the active component, even if the mains voltage fluctuations, and its output is a constant value, as the market generally small transformer, such as the Walkman and the like with the power, if the mains fluctuations, the output of the power supply will not follow fluctuations.
In general, the true no-load voltage ordinary power adapter and not necessarily exactly the same nominal voltage, because the characteristics of the electronic components can not be completely the same, so there is some error, the error is smaller, the higher the conformance requirements for electronic components , the cost of production is high, so the price will expensive.
In addition, with regard to the nominal current value, regardless of any power supply has a certain resistance, so when the power supply output current when the voltage drop generated internally, resulting in two things, one is to produce heat, so the power will be hot, and the other one is led to the output voltage decreases, the equivalent of internal consumption.
Second, are the same nominal voltage of the power supply, the output current is different and can not be used on the same books?
Supply voltage, the output current is different and can not be used on the same books. HP Laptop AC Adapter. The basic principle is that a large nominal current of the power supply can replace a small nominal current of the power supply. Estimated that someone would think so, I feel great nominal current of the power will burn the books, because the current big thing. How much is actually the current situation at the same voltage depends on the load, Oh, and think about the physical junior high school will know.
When the books when the high-load operation, the current bigger, when the books go into standby, the current is smaller, a large nominal current of the power supply has sufficient current margin. Conversely, someone with 56w 72w power supply instead of using them is also no problem, because the power adapter is usually designed to leave a margin, load power must be less than the electrical power, so that instead of in general use is feasible, but the rest of the power headroom rarely, once you pick up a lot of books peripherals, such as two usb hard drives, cpu running at full speed and then, and then there is a base above to a CD-ROM drive at full speed to read the disk, plus the same time charging the battery, estimated to be dangerous, you should feel free to feel the power is not already boiled eggs. So it is best not to use a small current power instead of high-current power supply.
Third, exactly the same machine, someone else’s power gentle, and I always very hot, why?
Let us not doubt your power problem, take a look at your books are doing, is not like the above said two USB hard disk, CPU running at full speed, hard disk read and write crazy, CD-ROM drive at full speed to read the disk, while charging the battery, loud place the music, the screen brightness maximum, wireless card has been detected signal and so on, make good use of power management, according to the task reasonable adjustments books working condition is very important.
Fourth, much higher than the nominal voltage of the power my laptop battery voltage will not hurt, right?
First, we must know is that the power supply to the laptop battery to power the books are different. Output of the battery powered, the battery is pure DC, clean enough, the battery voltage is neither possible nor necessary to design very high, the chemical characteristics of lithium batteries determines the output voltage of a power-saving core only at 3.6V, so many batteries are based on three series of the way, 10.8V will become very popular battery voltage. The nominal value of the integer multiples of some battery 3.6V slightly larger than some, such as 3.7V or 11.2V so, in fact, in order to protect the battery.laptopacadapter.com.au.
Power supply, the situation is more complex, you first need to add the voltage regulator further filtering to ensure stability in the power performance is not a good situation, after the voltage regulator is divided into two parts, power supply all the way to the books work, another way to charge the battery with the same battery power when the power supply to that part of the books, and that part of the need to charge the battery through the battery charge control circuit can only be applied to batteries, the control circuit can be very complex, so the supply voltage must be greater than the batteries have sufficient capacity to supply a voltage to the charging control circuit of each unit. Finally, the real core of the voltage applied to the electrical power supply will never be your nominal voltage. Rest assured.
