The power adapter is a power supply conversion device for some electronic devices, electrical appliances, etc., usually enclosed in a plastic shell, and can be divided into a wall-mounted type and a desktop type according to the connection mode.

The power adapter can be used in some small equipment and portable equipment, and its advantages are:

1. Small size and light weight. The power adapter does not use bulky industrial frequency transformers.

2. Security: The power adapter allows device designers to less worry about security issues. Most small electrical equipment requires low voltage and will not pose a safety hazard. However, if the mains power supply is used, the 110V/220V voltage of the mains makes the equipment need to consider safety issues. Therefore, if a switching power adapter is used, there will be no dangerous voltage in the enclosure of the device, and there is no need to consider similar hazards in electrical design.

3. Reduce heat generation: Heat will reduce the reliability and life of electronic parts, and will make some sensitive circuits inaccurate or malfunction. If you use a switching power adapter, the main heat will be in the AC adapter, the device itself has fewer heat sources, and the temperature will be lower.

4. Reduce electronic noise: radiated noise will decrease with the square of the distance. The power adapter can reduce the possibility of the device being affected by radiated noise.

Disadvantages of power adapter:

1. Volume: Some power adapters are directly integrated with plugs. Such plugs are larger than ordinary plugs. If used with a wiring board, other plugs may not be able to be inserted.

2. Weight: Some switching power adapters are very heavy and will allow the plug to bear excessive weight (depending on the plug design of each country).

3. It is possible that the power adapter has a large interference to the power circuit, and it is difficult to repair when a fault occurs

Commonly used power adapters: 5v switching power adapter, 12v switching power adapter, 15v switching power adapter, 24v switching power adapter, 36v switching power adapter, 48v switching power adapter, etc. Its power is: 5-280 watts

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