power supply

(redirected from AC adaptor)

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 kid-friendly MIT laptop is constructed of weatherproof rubber and can be powered either by an AC adaptor or wind-up crank.
Consumers who identify their AC Adaptor from the diagram below as one of those affected, should arrange for a replacement by visiting:
The company's densimeter comes complete with wind and dust shields, calibration weight, thermometer and AC adaptor.
Chief among the TransPort GX's array of benefits is backwards compatibility with TransPort ZX peripheral devices, including the port replicator, batteries, and AC adaptor.
The phone is sold with standard life battery, AC adaptor and one-year limited warranty.
With approximately four billion users of rechargeable cell phones, the annual amount of vampire energy lost by AC adaptor chargers totals more than $1 billion (US) of wasted electricity or 1,200 megawatts of power, which is about the size of a modern nuclear plant*," said Jeff Bock, director of product marketing for Freescale's Industrial and Multi-market segment.
It ships with a large suction cup windshield mount and cradle, a USB cable, AC adaptor, headphones, and a vehicle power adapter.
Also available in June are several accessories for the camera, including a travel case, battery booster pack, AC adaptor and Macintosh and Windows connection kits.
Accessories for the PB41 include a swivel belt loop, vehicle mounting bracket, DC power extension, AC adaptor, cigarette lighter adapter, and DB9F data cable.
The product ships with a convenient windshield mount, AC adaptor and cigarette lighter adaptor.
With the certification of PowerDsine's products, Pingtel xpressa phones can now be powered in one of three ways: with a direct AC adaptor power connection, with a proprietary Cisco Catalyst switch or Inline Power Patch Panel, or with PowerDsine's Power over LAN products that conform with the new IEEE 802.
Exclusive Powered Ethernet Support Eliminates AC Adaptor