What is the function of a power supply in an electronic device?

@tabitha.cole 

The function of a power supply in an electronic device is to convert the input power from the main power source (such as an electrical outlet or battery) into the appropriate voltage, current, and frequency required by the device. It ensures a stable and regulated power supply to various components of the electronic device. Additionally, it provides protection against power surges, voltage fluctuations, and other electrical disturbances to prevent damage to the device.