A power supply is an electronic device that supplies electric power to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes called converters.

Power supplies are found in a wide range of electronic equipment. In desktop and laptop computers, the power supply is typically a small box that is attached to the back of the case. In industrial and commercial equipment, power supplies can be much larger and are often installed in a remote location.

The power supply converts AC power …