Nara Power Adapter Factory
Main products: power adapter, medical power, LED power, charger and so on.
Shenzhen Lianyunda Electronics Co., Ltd. is committed to doing a good job in power supply products, and sincerely welcomes customers to contact us by phone or email.
Introduction to the power adapter
The power adapter can be generally divided into a wall-mounted type and a desktop type. It is a power supply conversion device, generally consisting of a casing, a power transformer and a rectifier circuit, and can be classified into an AC output type and a DC output type according to the output type thereof. Widely used in liquid crystal displays, monitoring systems, electronic refrigerators, small appliances and other equipment.
The role of the power adapter
The power adapter acts as a transformer and rectifier. The household AC is 220v, and our computer land is DC 12v (as if it is), so we can be sure that the power adapter is a transformer and rectifier. Then the adapter is a transformer, we should all know that the AC 220V is transformed by the transformer, and the DC is changed by the rectifier. Here, there is consumption, and these consumptions are converted into heat, so it is normal for the power adapter to heat up. The transformer is made of silicon steel sheet. After the transformer is energized, the magnetic flux is generated. The magnetic flux will cause a force between the silicon steel sheets to generate a click sound, which is normal. However, the sound of the earth is not normal, and there are many reasons: 1. The AC voltage is unstable. 2. The chip is damaged. 3. Short circuit between turns. 4. Component damage.
Power adapter characteristics
Power converter (AC to DC), converted from AC to DC, and then through the computer, it can not protect the computer, but the computer has a storage device (also called charger), so it can be protected in the event of power failure computer. Both the switching power supply and the adapter are switching power supplies, which are composed of a high frequency switching tube and its control circuit. The adapter power supply is a regulated switching power supply. The switching power supply charger has a floating charging function. The voltage becomes larger as the current becomes smaller. In the end, there is only voltage and no current.