Power Supply Ac Dc Adapter

The power adapter is also called an external power supply (switching power adapter), which is a power supply transformer for small portable electronic devices and electronic appliances.

It is produced because in real life, electronic devices often cannot directly use household electricity, because the power supply voltage used in the home is 220 volts, and the general electronic products generally require a power supply voltage of 5 volts to 20 volts. about.

The adapter is a transformer, so we should all know that AC 220v is transformed into a voltage through a transformer and transformed into a direct current through a rectifier. There is consumption here, and these consumption will be converted into heat, so it is normal for the power adapter to generate heat.

Power adapters are commonly found in small electronic products such as mobile phones, LCD monitors, and notebook computers. It is generally composed of a shell, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type. According to the connection method, it can be divided into wall type and desktop type. Power adapters are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LED lamps , Communications equipment, audio-visual products, security, computer cases, digital products and instruments and other fields, and in these fields have a role that cannot be ignored.