Ac Dc Power Supply

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Ac Dc Power Supply
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• An AC/DC power supply is a device that converts
  an alternating current (AC) input voltage to a
  direct current (DC) output voltage. The input and
  output voltages may or may not be identical and
  the voltage conversion may involve conversion to
  any number of intermediate voltages.

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• Power supplies are usually intended to provide a
  constant voltage output, although some types are
  capable of variable output voltages.
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• Some power supplies have multiple outputs with
  different voltages for example, a typical
  personal computer power supply has 5V, 12V,
  -12V and -5V outputs. The term "Uninterruptible
  Power Supply" (UPS) is used when the power supply
  incorporates a battery backup in case of mains
  failure.

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• A regulated power supply is one that maintains a
  constant output voltage even when the input
  voltage or the load resistance fluctuates. A
  switching power supply may include regulation at
  the cost of greater complexity.

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• The most common form of AC/DC power supply
  produces an unregulated DC output from an AC line
  source ("wall outlet"). These are often called
  "wall warts" due to their appearance.

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• AC/DC Power Supply designs are one of the most
  common tasks for a power engineer and come in all
  shapes and sizes. This course will teach you the
  basic principles of AC/DC Power Supply designs.

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• This course is aimed at practicing engineers who
  are required to design power supplies or carry
  out troubleshooting on existing designs. This can
  be for new designs, or upgrades to existing
  products.

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• The conversion process results in the removal of
  the AC component of the input signal and so
  produces a steady DC output level. The process is
  known as rectification, since it "straight-ens"
  the direction of current.

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• Industrial and domestic power supplies generally
  convert mains AC to DC for use in electronic
  devices. In power electronics and very high-power
  applications, AC/DC converters are widely
  employed to convert energy from one form to
  another.