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 global market for rugged power supply is segmented into system type, component, industry vertical, and regions/country.
Power supply would remain suspended from 132KV Haripur Grid Station on August 7, 20, 22, 26, 31, August from 09:00am to 04:00pm, resultantly consumers of 11KV Swabi Mira, Baldher feeder would face inconveniences.
Power supply will remain suspended from 132KV Dalazak Grid Station on April 27 from 9:30 am to 02:30 pm, resultantly consumers of 11 KV OPF, Wadpaga-I, II, Jinnah Medical College feeder will face inconveniences.
Similarly Power Supply will remain suspended from 132 KV Peshawar City Grid Station on 15 March from 9AM to 1PM,resultantly consumers of 11 KV Baghbaan, Gul Bahar-2, Islamabad, Faqir Abad-2, Sheikh Abad, Molvi G Hospital, Sethi Town and NHA feeder will face inconvenience Power Supply will remain suspended from 132 KV Gadoon Grid Station on 18 March from 9AM to 3PM,resultantly consumers of 11 KV Mix-8, Royal Textile, Jadoon Metal Works, Shehzad Ghee, Hamza Wood, Mardan Steel,GadoonTextile-1,2, Meezan Textile, Mix-2, Mix Hayat, Salar Steel and Chirat Paper Sack feeder will face inconvenience.
The newly developed method was implemented as software in an evaluation environment using the model-based development systems for power supply units, and it was confirmed that it could automatically diagnose when the power supply unit needs to be replaced, without the addition of any hardware components that monitor power supply degradation.
A cable assembly, NSN 6150-01-547-6755, is needed to connect the power supply to the LRAS3 system.
Introducing IPA 3503 compact ultrasonic actuator with integrated power supply. Also showing new ultrasonic punching unit to punch and emboss in one cycle at one station.
IBM has announced a research program to develop technologies that could help solve continually escalating power consumption issues and help reduce cooling and power supply costs for IT infrastructures.
Chicago, IL-based UV Process Supply has released the Con-Trol-Cure electric power supply. Capable of driving a UV curing lamp of nearly any spectral output, according to the company, this universal power supply eliminates the cost and requirement of a ballast-type power supply for each lamp type.
This has led to continuous improvements in power supply design, such as the company's new fiber optic equipped Paced solid-state power supply, and the CFC solid-state power control for channel furnaces for both single and three-phase systems.
A faulty power supply has forced NASA to halt indefinitely all research conducted with a key spectrograph aboard the Earth-orbiting craft.