Electronic device that converts or regulates electric energy and supplies it to a load
For other uses, see Power supply (disambiguation).
A simple general-purpose desktop power supply used in electronic labs, with power output connector seen at lower-left and power input connector (not shown) located at the rearInterior of high-end linear power supply with toroidal mains transformer.
A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into the load appliances that they power. Examples of the latter include power supplies found in desktop computers and consumer electronics devices. Other functions that power supplies may perform include limiting the current drawn by the load to safe levels, shutting off the current in the event of an electrical fault, power conditioning to prevent electronic noise or voltage surges on the input from reaching the load, power-factor correction, and storing energy so it can continue to power the load in the event of a temporary interruption in the source power (uninterruptible power supply).
All power supplies have a power input connection, which receives energy in the form of electric current from a source, and one or more power output or rail connections that deliver current to the load. The source power may come from the electric power grid, such as an electrical outlet, energy storage devices such as batteries or fuel cells, generators or alternators, solar power converters, or another power supply. The input and output are usually hardwired circuit connections, though some power supplies employ wireless energy transfer to power their loads without wired connections. Some power supplies have other types of inputs and outputs as well, for functions such as external monitoring and control.
A powersupply is an electrical device that supplies electric power to an electrical load. The main purpose of a powersupply is to convert electric current...
uninterruptible powersupply (UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load...
A capacitive powersupply or capacitive dropper is a type of powersupply that uses the capacitive reactance of a capacitor to reduce higher AC mains voltage...
A regulated powersupply is an embedded circuit; it converts unregulated AC (alternating current) into a constant DC. With the help of a rectifier it converts...
also called a PV system or solar power system, is an electric power system designed to supply usable solar power by means of photovoltaics. It consists...
general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the...
registered in London. On 17 April 1899, the first thermal power plant of The Calcutta Electric Supply Corporation Limited was commissioned at Emambagh Lane...
A welding powersupply is a device that provides or modulates an electric current to perform arc welding. There are multiple arc welding processes ranging...
In electronic systems, powersupply rejection ratio (PSRR), also supply-voltage rejection ratio (kSVR; SVR), is a term widely used to describe the capability...
ATX (Advanced Technology Extended) is a motherboard and powersupply configuration specification, patented by David Dent in 1995 at Intel, to improve on...
adapter (also called a wall charger, power adapter, power brick, or wall wart) is a type of external powersupply, often enclosed in a case similar to...
Power management integrated circuits (power management ICs or PMICs or PMU as unit) are integrated circuits for power management. Although PMIC refers...
Power cycling is the act of turning a piece of equipment, usually a computer, off and then on again. Reasons for power cycling include having an electronic...
switched-mode power supplies with output power more than 75 W must at least include passive power factor correction. 80 Plus powersupply certification...
paths. The USB standard included powersupply to peripheral devices; modern versions of the standard extend the power delivery limits for battery charging...
model, the Commodore 128, used a larger, improved powersupply which included a fuse. The powersupply for the Commodore REU was similar to that of the...
A typical power inverter device or circuit requires a stable DC power source capable of supplying enough current for the intended power demands of the...
used in other applications where power supply and signal communication take place over the same wires. Phantom power supplies are often built into mixing...
originally developed for desktop computers. Laptops run on both an AC powersupply and a rechargeable battery pack and can be folded shut for convenient...
A power cord, line cord, or mains cable is an electrical cable that temporarily connects an appliance to the mains electricity supply via a wall socket...
defined for special-purpose amplifiers, with additional active elements, powersupply improvements, or output tuning; sometimes a new letter symbol is also...
form of either alternating current or direct current from a welding powersupply, is used to form an electric arc between the electrode and the metals...
Global Information
