The obvious difference between desktop and wall type is that desktop power adapter needs AC cable to participate in power connection. Power adapters are widely used in security, communication products and small household appliances, especially in portable communication electronic terminals, most of which are powered by low power. For example, mobile phones and tablets generally use 15W power adapters, while small household appliances around computers generally use power adapters below 36W, Generally, the power adapter below 36W mostly adopts the plug-in wall type. The feature of this power adapter is that it does not need AC wire, which saves cost, saves space, and is safer to plug it directly.
Electronic products with slightly higher power, such as laptops and TVs, generally use power adapters below 120W. This style is generally desktop power adapters. The heat emitted by this kind of power adapter is not low, but because the heavy power frequency transformer is abandoned and the large heat sink group is removed, it is not safe to plug it directly without the participation of AC wire. The desktop type has a higher degree of internal collection, and it is easier to dissipate heat when separated from the surface alone. And those devices larger than 100W mostly use built-in power supply. Of course, there are also desktop power adapters with low power, such as multi port USB power adapter. In order to avoid excessive load of USB products on the device, desktop power adapter is adopted.
