(pow´&r brik) (n.) Also referred to as a transformer, an element of the external power supply for a notebook and/or laptop computer, used in conjunction with a battery pack. Since notebook computers rely on low-voltage DC, they need a way to convert the AC from a power source into DC that can be safely used by the computer. The power brick takes the AC voltage and converts it to a DC voltage slightly higher than the battery (the slight elevation in voltage ensures that the battery stays fully charged). Batteries normally supply the safe DC voltage to the portable computer, but power bricks are intended for use in conjunction with or instead of a mobile device��s battery.
Note Well: Unlike power supplies and voltage regulators for desktop computers, those for portable computers do not conform to any industry standards, so power bricks are not necessarily interchangeable among portable devices.
- power conditioner
Also called a line conditioner, a device that sits between a computer and its power supply, typically a wall outlet. The power conditioner provides protection against surges in power just as a surge protector does, but a power conditioner also maintains a continuous voltage fed to the computer during temporary voltage reductions, such as a […]
- power cycling
(1) In the case of a frozen or hung device, power cycling refers to turning the device’s power off and then on in order to get the device to function again. For example, if a desktop computer freezes, the user is unable to perform a routine shutdown by utilizing the shut down window. In order […]
- power down
To turn a machine off.
- power factor correction
Power factor correction (PFC) is a newer technology used in computer power supplies. PFC is applied to the circuits that include induction motors as a means of reducing the inductive component of the current and thereby reduce the losses in the supply. PFC has no effect on the operation of the motor itself. [Source: Adapted […]
- power line Ethernet bridge
A power line Ethernet bridge is a HomePlug device used to extend a LAN into a separate room using the existing electrical system in the building. An Ethernet cable from the network router is plugged into a bridge, which plugs into an AC wall outlet. In a separate room, a second bridge plugs into the […]