The power adapter manufacturer detailed classification and advantages and disadvantages of the power adapter

by:MOSO     2020-03-17
In small portable electronic devices such as phones composite aircraft, game consoles, the language repeater, walkman, our common notebook computers, cellular phones, etc to the power adapter. So what is the power adapter? What's the effect? The power adapter manufacturer will give you one by one. What is the power adapter? Power adapter, also called external power supply, a small portable electronic devices and electronic power supply voltage transformation equipment, its role is to put the home of 220 v high voltage into the electronic products can work around 5 v to 20 v low voltage stability, so they can work normally. Is also a small portable electronic devices and electronic power supply power transformation equipment, generally composed of shell, power supply transformer and rectifier circuit, according to its output type can be divided into the ac and dc output; According to the connection mode can be divided into the plug wall and desktop type. Take a look at below detailed classification and advantages and disadvantages of the power adapter. A power adapter, the type power adapter the two main points, linear power supply and switching power supply. 1, linear power supply is an alternating current through the transformer transformer, rectifier circuit dc voltage of the rectifier filter are not stable, the power adapter to achieve high-precision dc voltage, voltage feedback circuit to adjust output voltage must be made. Advantages: the power mature technology, simple circuit, and there is no switch power supply with the interference and noise. Weakness: the voltage feedback circuit is working in the linear state, adjust the tube power consumption is large, low conversion efficiency, by using inductive transformer weight equipment. 2, switch power supply is the use of modern electronic technology, control switch tube opened and shut off time ratio, to maintain stable output voltage of a power supply, power adapter, switching power supply by pulse width modulation (commonly 脉宽调制) Control IC and MOSFET advantages: high efficiency, small volume, can work in a wide voltage range. Weakness: the power circuit interference is bigger, the event of a failure maintenance is difficult. Second, sure enough the power adapter is a transformer and rectifier. The adapter is the transformer, we should all know, ac 220 v through a transformer transformer, through the variable dc rectifier, here is consumed, and the consumption will be transformed into heat, so the power adapter will be fever is normal. Made in silicon steel sheet, transformer after electrify, produce magnetic flux, flux between silicon steel sheet will incur to produce force, to produce buzzing sound, this is normal. But far the voice is not normal, the reason a lot of: 1, the ac voltage is not stable. 2, chip breakage. 3, turn-to-turn short circuit. 4, the damage of components. Three, the power adapter has a very wide range of applications in consumer electronics applications, provide the output power of most are within a 100 - watt, rapidly growing market demand. Such as electric bicycle battery chargers, small size LCD TV, laptop computer, printer, DVD player and set-top boxes are used, etc. Early power adapter are mostly adopted linear transformer, with the consumer electronics for power adapter is high efficiency and wide input voltage range of requirements, as well as copper, iron, and the increase of labor costs, this kind of power adapter inside the original linear transformer were gradually replaced by the switching power supply. Based on the advantages and disadvantages of the two is easy to distinguish. Basically see the volume, weight, output voltage range. Transformer type, after decompression through the coil, rectifier, regulator, large volume, stable performance and defect transformer cost is high, easy to heat. Switch type of small volume, low cost, quality is bad, but the components easily damaged. To distinguish the main volume and weight, the difference is obvious.
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