Power Supplies
Power supplies are considered reference to a source of electrical power. A power supply unit or PSU refers to a device or system that supplies electrical or other types of energy to an output load or group of loads. The term PSU is most commonly applied to electrical energy supplies, less often to mechanical ones, and rarely to others. Power supplies for electronic devices can be broadly divided into linear and switching power supplies. The linear supply is a relatively simple design that becomes increasingly bulky and heavy for high current devices. Voltage regulation in a linear supply can result in low efficiency. A switched-mode supply of the same rating as a linear supply will be smaller, and usually more efficient, but will be more complex.
replacement of power supply
