Power adapter, also known as external power supply, is a voltage conversion device for small portable electronic devices and electronic appliances. It is commonly used in small electronic products such as mobile phones, LCD displays, and laptops. Composed of components such as casing, transformer, inductor, capacitor, control IC, PCB board, etc. Its working principle is converted from AC input to DC output; According to the connection method, it can be divided into plug-in wall type and desktop type.
