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What is the power adapter?

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What is the power adapter?

Any electronic device needs a DC power adapter to supply the circuit work, especially for electronic products powered by the grid power adapter. In order to adapt to the fluctuation of the grid voltage and the change of the working state of the circuit, it is also necessary to have a DC stability that adapts to the grid voltage change and load change The power adapter. Switching stabilized power adapters convert voltage to high-frequency pulses and then perform electromagnetic conversion to achieve voltage conversion and voltage stabilization. A linear regulated power adapter is a series controllable adjustment element that divides the input DC voltage to achieve voltage conversion and voltage stabilization, which is essentially equivalent to connecting a variable resistor in series.

Switching regulated power adapters are highly efficient and can step up or step down. Linear regulated power adapters can only step down and have low efficiency. Switching regulated power adapters produce high-frequency interference, while linear regulated power adapters have no interference. Each has 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 regulated power adapter, enhance the adaptability to the power grid, reduce the size and reduce the weight, power adapters have emerged as the times require. In the 1970s, power adapters were used in home television receivers, and have now been widely used in color televisions, camcorders, computers, communication systems, medical equipment, meteorology and other industries, and gradually replaced the traditional series linear voltage regulator The power adapter has further improved the performance, efficiency and reliability of the whole machine.

Common series regulated power adapters are equipped with power adapter transformers, which have the advantages of stable output voltage and small ripple, but have a small voltage range and low efficiency. The output voltage of the parallel regulated power adapter is particularly stable, but the load capacity is very poor, and it is generally only used as a reference inside the meter.


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Release time: 2019.09.16 Source: Power adapter manufacturers
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Dongguan Qiqi Industrial Co., Ltd. specializes in producing: power adapters , chargers, LED drive power supplies, car chargers, switching power supplies, etc ...