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Precautions of Laptop AC Adapter

A 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.ACER Aspire 5738Z Laptop AC Adapter

The case of the active regulator element used for the internal power supply, even if the mains voltage fluctuate, and its output is also a constant value, the small transformer like the market in general, such as the power of the class with the Walkman, if mains fluctuations, The output of the power supply does not fluctuate.  Aspire 5740 adapter

General, true no-load voltage of the ordinary power adapter is not necessarily the nominal voltage exactly the same, because the characteristics of the electronic components can not be completely consistent, so there is some error, the error is smaller, the consistency requirements of electronic components higher production cost, so the price is also more expensive. Aspire 5741 laptop charger

Further, with regard to the nominal value of the current, regardless of any power supply has a certain internal resistance, so when the time of the power supply output current will be generated in the internal pressure drop, resulting in two things, one is to generate heat, so the power will be hot, and the other one is causing the output voltage is reduced, the equivalent internal consumption. Adapter Aspire 6920G

Second, are of the same nominal voltage power supply, the output current can be used in the same books?

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. The actually current much depends on the load in the case of the same voltage, Think of junior high school physical knew. Aspire adapter 6920

Switching power supply (2) When the books when the high-load operation, current books go into standby when the current is small, 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 power adapter designed to leave a margin, load power must be less than the power power, so this place in general use feasible, but the remaining power power margin is very small Once your books picked up a lot of peripherals, such as two usb hard drive, then cpu running at full speed, and then there is a base 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. So it is best not to use a small current power supply instead of the high-current power. Aspire laptop adapter 7230

Three identical machines, Managing the power of others, I am always very hot, and why?

First do not doubt your power, take a look at your books are doing, it 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, loud put the music, the screen brightness is the largest wireless network card has been in the detection signal, and so on, make good use of power management, reasonable adjustments to the working status of the books according to the task is very important. ACER Adapter Aspire 7220

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 tosupply of books is different. Charger Laptop Aspire 8920G 

Battery-powered, the battery output is a pure DC, very clean, the voltage of the battery is neither possible nor necessary to design very high, the lithium chemical characteristic determines a saving core of the output voltage can only about 3.6V, so many batteries are based on three series, 10.8V battery voltage will become very popular. 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.  Aspire ac adapter 8920G

Supply, the situation is more complex, you first need to filter added further voltage regulator to ensure that in the case of power performance is not very good, stable work, regulated voltage divided the city in two parts, and all the way to the books work feeding, another way to charge the battery, and to that part of the books powered with a battery-powered, but that part of the need to charge the battery only by the charging of the battery control circuit can be added in the batteries, the control circuit can be very complex, so the supply voltage must be greater than the battery voltage supplied to a charge control circuit of the respective units have adequate capacity. The last truly added to the batteries voltage will never be the nominal voltage of the power. Worry. ACER PA-1650-02 adapter

Use

Switching power supply products are widely used in industrial automation and control, military equipment, scientific equipment, LED lighting, industrial equipment, communications equipment, electrical equipment, instrumentation, medical equipment, semiconductor cooling and heating, air purifiers, electronic refrigerator, LCD display, LED lighting, communication equipment, audio-visual products, security, computer chassis, digital products and instruments class fields. ACER PA-1750-02 Laptop AC Adapter