What is the nominal voltage and current of Dell ac adapter mean?
The nominal voltage of power adapter normally refers to the open circuit output voltage, that is a voltage value not take any load and without current output. Therefore, this can be considered as the output voltage limit of ac adapter. 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 directly measured the nominal voltage, even if the mains voltage fluctuations in a certain place, the output is also a constant value. The current of power adapter. Regardless of any Dell laptop ac adapter has a certain amount of resistance, so when the Dell adapter output current, the voltage drop in the internally , which is equal to the output current multiplied by the ac adapter resistance. Resulted in two things, one is the heat generated is equal to the square of the output current multiplied by resistance, so the power will be hot. the other is nominal voltage becomes the output voltage m
