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 ?
Contract Awarded for Cable Assembly Power Electrical Adaptor
New rule: No electrical adaptor you find in your house will fit into any electrical gadget in your house.
He was traced after leaving a fingerprint on an electrical adaptor at the first premises and his blood on a kitchen tile at the second, Newcastle Crown Court heard yesterday.
The device has an electrical adaptor (which controls the amount of electrical power), a timer, a pump, and a jug (which you fill with water).
In the industrial activities segment, Confectionery industry, and Metal and welding workshop led the list of licensed activities with two licenses each, followed by Drilling of oil and natural gas Industry, Repair and maintenance of oil wells and natural gas, Strengthening oil wells and natural gas industry, Manufacture and packaging of milk and milk products, Furniture, Carpentry, and Electrical adaptors industry with one licence each.
Appendices provide references on fashion, holidays, equivalents, and international electrical adaptors, as well as contacts and resources.

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