Power adapters are divided into wall mount power adapters and desktop power adapters. In fact, it can be simply explained. The wall mount power adapter is the power adapter that the body can be directly plugged into the plug-in board.
The desktop power adapter is the power adapter that the body needs to be placed on the desktop. The difference between the desktop power adapter and the wall mount power adapter is that the desktop power adapter requires an AC cord to be connected to the mains.
Power adapters are widely used in security products, communication products, and small home appliances and consumer electronic products. Especially in portable consumer electronics and communication products, they are generally within 10W, such as smart phones and tablet computers 5 -10W power adapter for power supply.
Computer peripherals, security products, and small home appliances generally use power adapters below 36W. Especially in today's energy shortage and advocate energy conservation and environmental protection, products in this power section are the most common.
Notebooks, TVs and other products generally use power adapters below 120W, and more than 100W use built-in power supplies. However, there are also external power adapters below 200W. However, the number is relatively small.
Generally, wall mount power adapters are generally used below 36W. The feature of this power adapter is that it does not require AC wires, which saves costs and saves space. There is no need to place the power supply on the countertop. It is directly plugged into the board. It is also safer .
There are a few power adapters below 36W that use desktop type. This is generally because the product is far away from the AC plug-in board or because the power adapter is large in size and heavy, or the power adapter is heavy. For example, multi-port USB power adapter, in order to avoid the use of more USB products plugged in the above and lead to instability. And the power adapter larger than 36W is not suitable for wall-mounted. Because its volume and weight are larger. So 36W and above are generally used Desktop style.
In the early days, we had much contact with linear power supplies. For example, the repeaters used in the last century. The single-player power supplies are bulky and bulky. You may also encounter the embarrassing situation of falling directly from the plug board due to unstable insertion. .
However, with the development of science and technology, and the increasing tension on energy, the requirements for energy efficiency are getting higher and higher. Consumer electronic products have high efficiency and wide input voltage range requirements for power adapters, as well as the increase in copper, iron and labor costs. Most linear transformers are gradually replaced by switching power adapters.