power adapter - Computer Definition
A power supply for electronic devices. Also called an "AC adapter" or "charger," power adapters plug into a wall outlet and convert AC to a single DC voltage. Power adapters also exist for other purposes; for example, to output a different AC voltage, not DC. Computers use multiple DC voltages, and the power adapter is the external component of the power supply for a laptop computer. Internal circuits create the required DC voltages. Desktop computer power supplies are in one internal unit, which converts the AC to all DC voltages. See transformer, power supply, power distribution unit, power strip and USB charger.