Basic Power Supply Circuit Diagram With Explanation

Power supply block diagram many electronic circuits need a direct current dc voltage source but what we commonly find are voltage sources of alternating current ac.

Basic power supply circuit diagram with explanation.

An electric circuit is a closed loop with a continuous flow of electric current from the power supply to the load. It is quite easy to understand the working process of the switching power supply. The output from an ordinary power supply is fed to the voltage regulating device that provides the final output. In many of the circuit applications especially the ones using op amps a dual power supply becomes mandatory for enabling the and ground supplies to the circuit.

The basic principle of switching power supply 2 1 the basic principle of pwm switching power supply. A student learns that a rectifier circuit is often followed by a low pass filter circuit in an ac dc power supply to reduce ripple voltage on the output. The circuit drawn pertains to a regular industrial ups uninterruptible power supply which shows how the batteries take control during an outage in electrical supply or variation beyond the normal limits of the voltage line without disruption on the operation providing a steady regulated output 5 volts by lm7805 and an unregulated supply 12 volts. If we need dc power supply for circuits we choose stepdown transformer based rectifier circuit it may give constant dc voltage under regulator ics but when the current fluctuations occurs at input power source then the dc output supply will also gets affected.

Ideally a dc power supply unit commonly called a psu deriving power from the ac mains line supply performs a number of tasks. Looking over his notes from ac theory the student proceeds to build this power supply circuit complete with a low pass filter at the output. 12v 10a switching power supply with schematic and explanation 2. Regulated power supply block diagram.

To get rid of this drawback in traditional dc power supply method engineers electronic designers are go with smps circuit. A regulated power supply essentially consists of an ordinary power supply and a voltage regulating device as illustrated in the figure. A regulated dc power supply is also called as a linear power supply it is an embedded circuit and consists of various blocks. Designing a simple dual power supply actually involves a just a center tap power supply and a bridge rectifier along with a couple of high value filter capacitors as shown below.

Parts of a power supply. A regulated power supply is used to ensure that the output remains constant even if the input changes. It changes in most cases reduces the level of supply to a value suitable for driving the load circuit. In order to achieve a direct current voltage source the alternating current input must follow a conversion process like the one shown in the power supply block diagram below.

It produces a dc supply from the mains or line supply ac sine wave. The regulated power supply will accept an ac input and give a constant dc output.