Ac Dc Power Supply
                     Ac Dc Power Supply
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.
 Power supplies are usually intended to 
provide a constant voltage output, although 
some types are capable of variable output 
voltages.
Know More- Ac Dc Power Supply
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.
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.
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. 
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. 
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. 
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.
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.