Power cord adapter is a small portable electronic devices and electronic power conversion equipment, is generally composed of a casing, a power transformer and a rectification circuit. According to the output types can be divided into the AC output and DC output type; according to the connecting mode can be divided for in wall type and desktop. Extensive support in the telephone composite machine, game machine, language repeater, Walkman, notebook computers, cellular phones, etc. equipment.
Nominal voltage and current of the power cord adapter is what mean? First, general power cord adapter nominal voltage is refers to the open circuit output voltage, is outside connected with any load, no output current when the voltage, so it can be understood as, this voltage is, the power cord adapter output voltage limit.
In the power cord adapter using the active voltage stabilizing element, even if the fluctuations in mains voltage, its output is also a constant value, as the market general transformer, such as like the Walkman with power, if the city power fluctuation and the power cord adapter output does not fluctuate of.
Generally speaking common power cord adapter real no-load voltage and nominal voltage completely consistent, because electronic components characteristics may not be exactly the same, so there are some errors, error is small, requires higher consistency of electronic components, the production cost is high, so the price is also expensive.
The power cord adapter, power supply, first of all need to further filter regulator on the accession of the voltage, so as to ensure the stable work in the power performance is not very good, the regulated voltage is divided into two parts, a road to notebook power supply, another way to battery charging, to the notebook power supply that part with the battery power supply when the same, and to charge the battery of the part need through the battery charging control circuit to the electric core, control circuit can be very complex, so the power cord adapter voltage must be greater than the battery voltage is sufficient capacity to supply to charge control circuit of each unit. At the end of the electric core voltage applied to the real is not your nominal voltage power cord adapter.
A suitable power cord adapter is the requirement of the certification, the certification of the power adapter can protect the security of the person. To prevent electric shock, fire and other dangerous.