power supply

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power supply

[′pau̇·ər sə‚plī]
(electronics)
A source of electrical energy, such as a battery or power line, employed to furnish the tubes and semiconductor devices of an electronic circuit with the proper electric voltages and currents for their operation. Also known as electronic power supply.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

power supply

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

power supply

A system that converts AC current from the wall outlet into the DC currents required by electronic circuits. A computer power supply converts AC into multiple DC voltages. For example, 12 volts is commonly used for drives, while 3.3v and 5v are used by the chips and other motherboard components.

Switching Power Supplies
Power supplies known as "switching" power supplies are commonly used. Their name is derived from the type of circuit used to change the voltage. For more details, see transformer. See power adapter.


Typical Voltages
This monitor displays the typical three voltages generated by a PC power supply.







One Size Does Not Fit All
Like everything else in our high-tech world, power supplies come in myriad sizes and shapes; witness this table full of different units from Sparkle Power Inc. (www.sparklepower.com).







External "Bricks"
Laptops use an external power supply, called a "power adapter" or "power brick." It converts AC to a single DC voltage that goes to the laptop's internal power supply, which generates all other required voltages. External adapters are used to reduce the size and weight of the laptop, yet they typically ride along in the laptop case, adding back the weight after all.
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References in periodicals archive ?
The plug in question is a British-style three pronged white AC adapter with no lettering near where it attaches to a power adapter.
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Connect the AC adapter directly to the console until the battery is fully charged.
A convenient storage compartment for a power brick or AC adapter is hidden yet easily accessed.
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Consequently, it also can be used to measure the power consumption of battery-driven devices and devices powered by a DC power supply such as an AC adapter. In addition, the instrument can measure the standby power of devices powered by AC adapters, a capability that is in increasing demand today.
It also comes with a built-in rechargeable battery which is good for up to 15 hours of unplugged music at a time, a frequency contouring circuit for musically accurate tonal balance, a telescoping FM antenna, a built-in AM antenna, AC adapter and a stereo mini-cable.tivoliaudio.com
A new optional slim 65W AC adapter, weighing 53 per cent less (235g) than the standard AC adapter, is now offered with the new X1 Carbon Touch.
An AC adapter and nylon travel pouch are also included.
Each monitor is powered via a four-pin XLR 12V DC connector with included AC adapter or an optional snap-on JVC BN-VF823 7.2V battery.