Schematic Diagram Of Power Supply With Explanation

By | December 7, 2021



Understanding the Schematic Diagram of Power Supply



As a crucial part of any electronic device, the power supply plays an important role in delivering electricity to all other components. To effectively manage this power, a schematic diagram of a power supply is often used to visualize the various parts involved and to provide an easy way to trace power flows. This article will take a closer look at the schematic diagram of a power supply and its different components in detail to help readers better understand how it works.

What is a Power Supply?



A power supply is a device that provides electrical energy to another device or system. It forms a crucial part of any electronic device as it is responsible for providing electricity to all other components. The power supply typically supplies voltage and current to the device, which can vary in size, wattage, and type depending on the application.

The Components of a Power Supply



A power supply is made up of several components, each with their own function. These components are usually represented in a schematic diagram, which is a useful visual representation of the various parts involved. The common components of a power supply include the AC adapter, power switch, thermal cut-off, fuse, rectifier, capacitor, resistor, bridge rectifier, voltage regulator, and output circuits.

The AC Adapter



The AC adapter is responsible for converting AC power from mains to DC power for the rest of the circuit. It takes alternating current (AC) from a wall outlet and converts it into direct current (DC). The AC adapter is also known as the transformer, and it can be identified on a power supply schematic by the pair of coils connected to the main input.

The Power Switch



The power switch is the first stage in the power supply and is responsible for switching the device on and off. It consists of a mechanical or electronic switch that can open or close the power supply circuit when activated. On the schematic, a power switch is typically represented by an arrow pointing towards the input or output terminals.

The Thermal Cut-Off



The thermal cut-off is a safety device that prevents overheating of the power supply. When the temperature of the power supply reaches a certain level, the thermal cut-off switch will automatically turn off the power supply to prevent it from being damaged. It can usually be identified on the schematic by two curved lines connecting the AC adapter and output terminals.

The Fuse



A fuse is a small, thin device that is used to protect the power supply from short circuits. It acts as a break in the circuit and will heat up and melt when too much current flows through it. A fuse is usually represented on the schematic with an "F" followed by a number indicating the amperage of the fuse.

The Rectifier and Bridge Rectifier



The rectifier is a device that converts AC voltage to DC voltage. The bridge rectifier consists of four diodes, which are semiconductor devices that allow current to flow only in one direction. Both the rectifier and bridge rectifier can be identified on the schematic by the pairs of diagonal lines connecting the power source to the other components.

The Capacitor



A capacitor is an electronic component that stores energy. It consists of two conducting surfaces separated by an insulator and is used in power supplies to filter out noise and smooth out ripple signals. On the schematic, a capacitor can be identified by the two circles connected by a line.

The Resistor



A resistor is an electronic component that reduces the flow of current in a circuit. It is used to regulate the voltage and current in a power supply and can be identified on the schematic by a "R" followed by a number indicating the resistance of the resistor.

The Voltage Regulator



The voltage regulator is a device that regulates the output voltage of the power supply. It is usually represented on the schematic by three pins pointing inwards, with a line connecting the output terminal to the center pin.

The Output Circuit



The output circuit is responsible for directing the voltage and current from the power supply to the other components of the device. It is typically represented on the schematic with a dashed line connecting the output terminal of the power supply to the other components.

Conclusion



Understanding a power supply schematic is an essential skill to have when working with electronics. This article has explored the various components of a power supply in detail and discussed how they are represented on a schematic diagram. By learning about the components and their functions, readers should now have a better understanding of how a power supply works.


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