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.

power supply

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.
References in periodicals archive ?
The new PSI 9000 2U power source includes all of the features and functions of its higher-power '3U' cousin," said Gerard Sheehan, Intepro's Chief Technical Officer.
The Gray Alternative Power Source is also in patent pending status with the United States Patent and Trademark Office.
As a result of the synchronous non-sinphase control, the current of the individual modules are displaced with respect to time thus improving the parameters of electrical energy both at the input and output of the power source.
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Eight Companies to Watch in the IoT Power Source Market
The AC6800 Series basic AC power sources offer intuitive user interfaces that make it easy for engineers to access and view setup and measurement information directly from the front panel or programmatically via SCPI (Standard Commands for Programmable Instruments) commands.
com)-- The Visiongain author of the Military Energy, Fuels and Power Source report comments that: "Defence spending on fuel and energy is becoming an increasingly important factor at a stage when power is shifting towards a global system of competing antagonists.
jumped 20 percent Friday, as the alternative power source company received a jolt of attention on Wall Street after the blackout swept through the Northeast.
To free recipients from being tehtered to a bulky power source during that time, hs company is working on a battery-powered device worn in a vest, he told SCIENCE NEWS after the meeting.
The PTS Automatic Power Transfer Switch allows for two inputs from a primary and secondary power source to deliver redundant power to single power supply devices.