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2. Switched-mode power supply - Wikipedia

   en.wikipedia.org/wiki/Switched-mode_power_supply

   In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. The switched-mode power supply's higher electrical efficiency is an important advantage. Switched-mode power supplies can also be substantially smaller and lighter than a linear supply because the transformer can be much smaller.

3. Power supply - Wikipedia

   en.wikipedia.org/wiki/Power_supply

   An integrated power supply is one that shares a common printed circuit board with its load. An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics ...

4. DC connector - Wikipedia

   en.wikipedia.org/wiki/DC_connector

   Heathkit power supply female connector for tube equipment. There are a number of similar design PC board power connectors, including Molex Mini-Fit SR, Molex Mini-fit jr., MOLEX MICROFIT and Molex SABRE connectors, and AMP DUAC connectors that look similar to each other. Some plugs with three, four, five or more pins are also called DC plugs.

5. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   Used in Yamaha and Casio keyboard power supply 6.50 3.10 1.00 Philmore 285 6.50 3.40 1.40 9.0 18 VDC @5A Kobiconn 6014-E used often for laptop computers 6.50 4.10 1.00 U JEITA RC-5322 24 VDC @ 2A Lumberg 1636 06 Epson Photo Scanners V600, etc. 6.50 4.30 1.40 T EIAJ-05, JSBP5 13.5–18.0 V Lumberg 1636 05 Philmore 265 CUI Inc. PP-016 Philmore 214

6. Power supply unit (computer) - Wikipedia

   en.wikipedia.org/wiki/Power_supply_unit_(computer)

   [16] [17] For a comparison, a 500-watt power supply carrying the 80 Plus Bronze efficiency rating (which means that such a power supply is designed to be at least 82% efficient for loads above 100 W) may provide an 84% efficiency for a 100 W load, wasting only 19 W. [18] Other ratings such as 80 Plus Gold, 80 Plus Platinum and 80 Plus Titanium ...

7. Inrush current - Wikipedia

   en.wikipedia.org/wiki/Inrush_current

   Its resistance begins to drop, and a relatively small current flow charges the input capacitors. After the capacitors in the power supply become charged, the self-heated inrush current limiter offers little resistance in the circuit, with a low voltage drop with respect to the total voltage drop of the circuit.