What is Regulated Power Supply? Why do we need it? Elementary Electronics - IEB

What is Regulated Power Supply? Why do we need it?

Regulated Power Supply:

A DC Power supply which maintains the output voltage constant irrespective of AC main

function or load variation is known as regulated DC power supply.

Why do we need it:

1/ In practice, there are considerable variation in AC line voltage caused by outside

factors beyond our control. This changes the DC output voltage. Most of the electronic

circuits will refuse to work satisfactory on such output voltage flue situation. This

necessitates to use regulated DC power supply.

2/ The internal resistance of ordinary power supply and relatively large (>302). Therefore,

output voltage is markedly affected by the almost of load current drawn from the supply.

The variations in DC voltage may cause erratic operation of electronic circuits.

Therefore regulated DC power supply is the only solution in such situation.

Circuit diagram of regulated power supply using ziner diode:

Regulated Power Supply

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