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A six-way connector on a "universal" DC power supply, consisting of a four-way X connector and two separate individual connectors (one is the nine-volt battery connector). The X-connector here provides 3.5 and 2.5 mm phone plugs and two sizes of coaxial power connector Universal laptop power supply with adjustable voltage between 12 and 24 volts
A modern computer power supply is a switch-mode power supply that converts AC power from the mains supply, to several DC voltages. Switch-mode supplies replaced linear supplies due to cost, weight, efficiency and size improvements. The diverse collection of output voltages also have widely varying current draw requirements.
The use of cigarette lighter receptacles to supply 12 volt DC power is an example of backward compatibility to a de facto standard. As a power connector, the lighter receptacle is larger, harder to use and less reliable than other DC connectors [citation needed]. Cigarette lighter receptacles are in widespread use in many highway vehicles and ...
Two different airline in-seat power supply system (ISPSS) standards for DC power have been used in the past. American Airlines in the past used an automobile auxiliary power outlet. Most other airlines that provide DC power use the smaller EmPower system, which has a 4-pin Hypertronics' D-series connector. It can supply 15 volts maximum 5 amperes.
In 2019 Intel released a new standard based on an all-12V design: ATX12VO. The power supply only provides 12 V voltage output; [13] 5 V, 3.3 V powers, as needed by USB, hard disk drive and other devices, are transformed on the motherboard; and the ATX motherboard connector is reduced
An SMPS designed for AC input can usually be run from a DC supply, because the DC would pass through the rectifier unchanged. [35] If the power supply is designed for 115 VAC and has no voltage selector switch, the required DC voltage would be 163 VDC (115 × √2). This type of use may be harmful to the rectifier stage, however, as it will ...
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