PC Material IP44 Outdoor Vertical Enclosure AC Adapter

What is a power adapter?

Any electronic equipment needs dc power adapter to supply circuit work, especially the electronic products powered by power grid power adapter. In order to adapt to the fluctuation of power grid voltage and the change of the working state of the circuit, it is necessary to have dc regulated power adapter to adapt to the change of power grid voltage and load. Switching voltage regulator power adapter is by changing dc into high frequency pulse, and then electromagnetic transformation to achieve voltage conversion and voltage regulation. Linear voltage regulator power adapter is directly connected in series with a controllable adjusting element to divide the input DC voltage to achieve voltage transformation and voltage regulation, essentially equivalent to a variable resistor connected in series.

Switching regulator power adapters are efficient and can boost or reduce voltage. Linear regulated power supply adapters can only buck and are inefficient. Switching regulated power adapters produce high frequency interference, while linear regulated power adapters have no interference. Each has its advantages and disadvantages.

In recent years, with the development of electronic technology and people's research on how to improve the conversion efficiency of the stabilized power adapter, enhance the adaptability to the power grid, reduce the size and reduce the weight, the power adapter came into being. In the seventy s, the power adapter is applied in the domestic television receiver, now has been widely used in color TV, camcorder, computer, communications systems, medical apparatus and instruments, meteorological and other industries, and gradually replaced the traditional linear regulated power supply series adapter, make the whole machine performance, efficiency and reliability have been further improved.

The common series regulated power adapter is installed with a power adapter transformer, which has the advantages of stable output voltage and small ripple, but the voltage range is small and the efficiency is low. Parallel regulated power supply adapter output voltage is particularly stable, but the load capacity is poor, generally only in the instrument for reference.