The power adapter is a small portable electronic device and a power supply conversion device for electronic appliances.

Inductors, capacitors, control ICs, PCB boards and other components, its working principle is AC input into DC input, and the connection mode can also be divided into wall type and desktop type.

It is widely used in security cameras, set-top boxes, routers and other equipment. ”

The power rating is the output power of the power supply at the rated voltage and current.

Maximum power is the maximum output power that the power supply can withstand. Also called peak power.

The actual power is the work of the power supply that actually works.

It is mainly the current that causes the change in power. The voltages are fixed at 5V and 12V, and each power circuit has its own rated operating current. Under normal circumstances, the actual working current is always less than the rated working current.

After adding or replacing high-power accessories, the actual working current may exceed the rated current of the power supply, and the power supply is in an overload operation state.

The power supply is overheated for a long time, which will lead to long-term heating and aging of the components, which will further affect the decline of the rated power and reduce the service life of the power supply. For power supplies without protection circuits, this can lead to power burning.