Laptop AC Adapter knowledge ( 1 )
Recently, ZOL forum , “Deny Romance ” as we shared a common sense about
notebook power adapter , Next we recommend.
First, the power adapter ( hereinafter referred to as the power ) of the nominal voltage and current is what does this mean ?
First , the nominal voltage general power supply , refers to the open circuit output voltage is not connected to any load outside , when there is no current output voltage, as can be understood , this voltage is the power supply output voltage limit. For the internal power supply voltage of active elements used in the case , even if the mains voltage fluctuations , the output value is constant , as the market is generally small transformers , such as music players and the like with the power , if the mains fluctuations , the output of the power supply will also fluctuate . Generally, ordinary For
Apple Laptop AC Adapter no-load voltage is not necessarily real and nominal voltage exactly the same, because the characteristics of electronic components can not be completely the same, so there is a certain degree of error , the error is smaller, conformance requirements for electronic components higher , the production cost is high , so the price also expensive .. In addition , on the nominal current value , regardless of any power supply has a certain degree of resistance, so that when the Replacement Dell Power Supply output current, the voltage drop will be generated internally , cause two things , one is to produce heat, so the power will be hot , the other is causing the output voltage decreases , the equivalent of internal consumption.
Second, are the same nominal voltage supply, the output current is different and can not be used in the same books ?
Supply voltage , the output current is different and can not be used in the same books . The basic principle is that a large nominal current of the power can be used instead of small nominal current of the power . Estimated someone would think so , I feel great nominal current of the power will burn books , because the current big thing. How much current is actually the case in the same voltage depends on the load , Oh, think of junior high school physics will know.
When the books when the high-load operation , the current bigger, books go into standby when the current is smaller, there is a large nominal current of the power supply sufficient current margin. On the contrary , it was replaced with 56w 72w of power have no problem with it , because the power adapter is usually designed to leave a margin , load power must be less than the New HP Laptop Charger , so this place in general use is feasible, but the remaining power headroom rarely , once the books you pick up a lot of peripherals, such as two usb hard drives, then cpu running at full speed , and then there is a base, a CD-ROM drive at full speed to read the disk , plus simultaneously to charge the battery , estimated in danger , we should always to feel your power is not already boiled eggs. So it is best not to use a small current power supply instead of high-current power supply.
Laptop power adapter common sense ( 2 )
Third, the same machine , the power of others gentle , and I always very hot , and why ?
Let us not doubt your power supply have problems, 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 , drive at full speed to read the disk , while charging the battery , put loud the music , the screen brightness maximum , wireless network card has been detected signal and so on, make good use of power management, according to the task rationally adjust the working status of the books is very important.
Fourth,New
Toshiba power Adapter voltage than the nominal voltage of my laptop battery is much higher , it will not be an accident ?
First, we must realize is that power to the laptop power supply and battery for books is different.
Battery -powered , the battery output is pure DC , clean enough, the battery voltage is neither possible nor necessary to design very high , the chemical characteristics of the lithium battery of a power-saving core determines the output voltage of only 3.6V or so, so many batteries are connected in series using three methods , 10.8V also became very popular battery voltage. Some batteries 3.6V nominal value of an integer multiple is slightly larger than some, such as 3.7V or 11.2V , and so , in fact, in order to protect the battery.
Power supply , the situation is more complex , you first need to add the voltage regulator further filtering to ensure that the power supply performance is not a good situation stability, voltage regulator two parts of the city , all the way to the laptop power supply work , another way to charge the battery for Cheap Asus laptop ac adapter that part of the time with the same battery and charging the battery through the battery requires that part of the charge control circuit can only be applied to the batteries , the control circuit can be very complex, so the power voltage must be greater than the batteries have sufficient capacity to supply voltage to the charging control circuit of each unit . Finally a real added voltage on batteries you will never supply nominal voltage. Rest assured.
Another search, we look at the battery charge control circuit includes what things should include primary regulator , precision tunable regulator , SCR adjust pulsation output , voltage output , current feedback , the charging process of recording and computing chips , since the feedback regulation of the charging process parameters, etc. , Oh , is not feeling still very necessary part of the electrical energy consumed ah.
Laptop power adapter common sense ( 3 )
Five , why theoretically wife ‘s power supply is usually better than the non-original ?
Oh, I think this issue should be of concern is that many of the Friends . Theoretically . Original power certainly better, but the actual use may not feel the difference . Normally our device has a voltage input range of security , such as a 2.5 mobile hard disk , which is plus or minus 5% requirement 5V , too high or too low, the protection circuit will stop devices work . If the protection circuit is activated , it means that before this, your machine has been close to or exceeded its design can withstand the upper or lower limits , which are affecting the life of the machine . ( Of course, here referred to non- original
MSI Laptop AC Adapter , or good workmanship , poor quality products, they do not mention it. )
The problem may be even more important books of data security, automatic protection sudden stop working for a computer is a terrible thing , especially a lot of friends without the battery . Sometimes the computer restarts and also somehow related to this . For the original power supply , the manufacturers are aware of their power needs to have much of the load capacity of the calculated nominal voltage and current security certainly more accurate . However, if you use a non- wife adapters , such as general-purpose transformers and the like, these problems can not be seriously considered , this is the user from the electrical parameters can only try to find ways to get compatible , but each adapter’s internal resistance is different, nominal voltage tolerance may be different under the nominal current output voltage variation range may be different if you’re not careful measurement of the relevant values ??, certainly , there is a risk . This is the difference between original and non-original here can not say to the poor power supply , ah, this stuff is certainly much less insurance .
