Introduction to DC Power Supply:
The dc power supply converts the standard 230 V, 50 Hz , ac signal available at wall outlets into a constant dc voltage. The dc voltage produced by a power supply is used to power all types of electronics circuits, such as television receivers, stereo systems, VCRs, CD players and most laboratory equipments.
Basic block diagrams for a rectifier and complete power supply are shown in diagram below. The rectifier can be either a half-wave rectifier or a full-wave rectifier. The rectifier is the main component of DC power supply. It converts the ac input voltage to a pulsating dc voltage, which is half-wave rectified as shown in diagram. The filter element of supply eliminates the fluctuations in the rectified voltage and produces a relatively smooth dc voltage. The regulator is a circuit that maintains a constant dc voltage for variations in the input line voltage or in the load. Regulator vary from a single device to more complex integrated circuits. The load is a circuit or device for which the DC power supply
Block Diagram of DC Power Supply: