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 ?
Dmc 50 Input Voltage 380-440V, Output Current 50 Amin Principal Pulse Modulating Ac To Dc Converter Power Consumption 22-70 Kwh, Polarity Switching 5-120 Sec.
This feature eliminates the need of additional AC to DC converter and thus reduces the cost of the system.
Multiloop control of a unity power factor fast switching ac to dc converter.
5Percent Of Full Scale, Voltage Source Brushless Ac Hand Cranked Generator With Rectifier And Ac To Dc Converter And Fuse, Operating Temperature 10 To 50Degree C .
High-power, high-frequency devices - such as high power radar and RF amplifiers, and DC to DC and AC to DC converters - have performance limitations due to the physical structure of standard silicon substrates," said Dwain Aidala, president and COO of sp3 Diamond Technologies.
located in West Jordan, Utah, has been selected to provide AC to DC converters for Boeing's new V-22 transport aircraft designed for vertical take-off and landing.