source:Industry News Popular:adapter release time:2022-03-29 09:54:35 Article author:sznbone
There are many kinds of power adapters on the market, and the prices of power products with the same power can sometimes vary by as much as tens of yuan. This is because the power adapter products are divided into high and low grades like other electronic products due to different circuit schemes and materials. So what is the difference here?
For example, a medium-sized power supply, first of all, we look at the material of the casing. Even if the high-end power supply has a scratched appearance, its texture and brightness are also different, because it is made of new fireproof plastic injection molding. The low-end appearance does not look shiny, gray. Because it is made of recycled plastic, the price of raw materials varies several times.
Secondly, you can see the material and electroplating of the metal part. The exposed metal of many high-end power supplies is nickel-plated copper, or the thickness of the plating will be thicker and the brightness will be higher, because high-end power adapters must pass the salt spray test. Therefore, we sometimes find that the plug of the mobile phone charger bought for a few dollars will rust on the plug, while the original charger of the brand mobile phone will not rust for a long time.
If you know a little bit of electronics, you can dissect the power adapter. Low-grade power adapters and chargers generally use triode solutions. It does not have integrated IC to control, just self-oscillation of transformers and triodes. Some are very low-end. The charger even has only one rectifier diode, and then there may be no filter capacitor behind it, or there is only one rectifier diode for a small battery, and there is no photocoupling element and voltage regulator IC. There is also no fuse in the front. There is no safety guarantee, and the radiation is large, which poses a threat to human health.
The power adapter complies with safety regulations, and each component has safety considerations. The overall power adapter has passed the safety certification, and the circuit has built-in protection functions such as overvoltage, overcurrent, overload, and short circuit, which can better protect the electrical appliances and the power adapter itself. The protection function makes the life of the electrical appliance and power supply longer.
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