power supply


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Related to power supply: power supply circuit, regulated power supply, ATX power supply

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 ?
Table 9 - Worldwide Embedded AC-DC Power Supply Market, by Applications ($/unit) OO.
Table 10 - Worldwide Embedded AC-DC Power Supply Market by Communications Sub-Segment (millions of units)OOOOOO.
Table 11 - Worldwide Embedded AC-DC Power Supply Market by Communications Sub-Segment (millions of dollars)OOOOO.
Importantly, the bench order calls on the parties to the rate case to propose modifications to the PSA to address power supply cost recovery and timing issues on permanent basis.
Conversely, a reasonable outcome in APS's pending general rate case, including modifications to the PSA that result in greater confidence that prudently incurred power supply costs will be recovered, in full, on a timely basis, along with better nuclear plant performance, could lead to favorable rating actions, in Fitch's view, in the intermediate to longer term.
However, the load growth has not abated and is projected to continue for the foreseeable future, requiring a longer term power supply fix, employing more baseload generation.
While Tri-State is in the relatively early stages of this comprehensive power supply plan and enjoys flexibility in the development of these units, it has the potential to be a credit concern as the new infrastructure needs could result in a tripling of Tri-State's outstanding debt.
Utilizing its proprietary advanced technologies and design know-how, ERS provides cost-effective power conversion solutions to power supply manufacturers, OEMs and consumers striving to meet the new challenges of the AC/DC power conversion market.
The LCD-TV, CRT-TV, ATX and notebook adapter power supply reference designs that ON Semiconductor has successfully developed, built and fully tested during the past year, demonstrate our ongoing dedication to deliver industry-leading, energy efficient power sources," said Andy Williams, vice president of ON Semiconductor's Power Conversion Products Division.
NCP1395 - a high performance resonant mode controller that offers everything needed to build a reliable and rugged power supply.
Once the default has gone, the device auto-recovers and the power supply resume operation.
The NCP1337 is ideal use in power supplies in CRT-TVs, notebook AC-DC adapters, offline battery chargers, other consumer electronics such as DVD players and set-top boxes, and any power supply where efficiency and low EMI signature are needed.