The role of the power supply is to provide the stable voltage required by the electrical appliances. Since all kinds of electrical appliances are now required to work under a stable voltage, the power supply must not only provide the required voltage, but also provide a stable voltage. In a broad sense, the power supply includes power supply and power supply circuit. Common power supplies include 220V AC provided by the mains, and various batteries. Common power supply circuits include various regulated power supplies, uninterruptible power supplies, etc. These power supply circuits process the voltage provided by the power supply into the voltage required by electrical appliances, and the processed voltage is stable. Therefore, the power supply circuit is a very important part of the power supply. All electrical appliances must have a good power supply circuit in order to work normally.
