Dell PA-9 adapter normally refers to the open circuit output voltage

First, the nominal voltage of power adapter Dell inspiron 1300 Adapter Dell PA-6

adapter Dell PA-9 adapternormally refers to the open circuit output voltage, that is, do not take any load, there is no current output voltage value. Therefore, that this is the power supply output voltage limit. For the internal use of the initiative power supply unit or voltage regulator components of the benchmark, in general the use of high resistance DC voltmeter can be directly measured nominal voltage (electromotive force should be a more accurate method of bridge belongs to the University of General Physics course experiment, not repeat them here), even if the mains voltage fluctuations in a certain place, is secure in its output a constant value; but for a small market, low-cost transformers, such as the Walkman and the like to the type used is basically the traditional magnetic core transformer with four rectifier diode bridge rectifier coupled with a large filter capacitor on the bin, and so if you use common dc voltage meter measured value will be greater than the nominal voltage, because the output of bridge rectifier pulsating DC, simply said to be a sinusoidal voltage signal is a half weeks of time connected chain, after going through the filter capacitor will become flat after some, but the ripple coefficient remains high (ripple coefficient is the same magnitude of voltage signal fluctuation the average voltage ratio, the smaller the closer description voltage direct current), the so-called nominal voltage refers to the time integral of this voltage divided by the integration time, simple to understand is the right time, on average, if an ordinary DC Voltage Meter , measured value is very close to the maximum value of the voltage signal, so uncertainty. At the same time, if the electricity fluctuate, the output of such power will change as well.

In general, the real average no-load voltage of the power adapter is not necessarily exactly the same nominal voltage, because the characteristics of electronic components can not be exactly the same, so it allowed a certain margin of error, civil cases according to the need to control the use of 0.1% to about 5%. The smaller errors, the consistency of demand for electronic components, the higher the cost of industrial production, the higher the price of course, the more expensive.

Dell PA-9 adapter normally refers to the open circuit output voltage

By: johnsunvalley

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