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Significance of Power Supplies Decoded!

Power Supply in Electronics serves as the much-needed oxygen that is required to breathe life into any electronic device.

Power Supply in ElectronicsEvery living creature whether we are talking about plants or animals requires food and water to supply itself with energy to get any work done. Have you ever wondered what gives energy to non-living or specifically to electronic devices?

Just like any non-living thing needs an external push to get them to work, every digital device needs a power source to make them do the work we needed them to.

And that power source comes in the form of Power Supply in Electronics that power up the required device with the correct form of electrical energy that is required to get the work done till we needed it.

Power Supply in Electronics serves as the much-needed oxygen that is required to breathe life into any electronic device.

Power Supply in Electronics acts as an important element in many items of electronics equipment since some come in the form of battery-driven while others need mains power supplies as the requirement arises.

Power supply in electronics circuitry and design is essentially the most important aspect to ensure the successful operation of the whole equipment.

Before discussing further, the significance and the need for Power Supply in Electronics, let us understand some basic facts about a Power Supply in Electronics and how does it work.

Defining Power Supply in Electronics

The power supply refers to an electrical device that is used to give electrical supply to electrical loads.

Its main function is to convert the electrical current coming from a source to the accurate voltage, frequency and current needed by the device to supply the load.

Often, these power supplies are given another name like electric power converters due to their function.

Synonymous to their name, Power Supply in Electronics, specifically for a computer, is the essential part of the system that powers up the whole system and without which a PC is incomplete.

General Structure of a Power Supply in Electronics

Power Supply ElementsTypically, when we talk about the basic structure of a power supply, we usually define it in terms of a series of blocks, each of which performs a specific function.

To simplify it further, let’s take an example of a 5V regulated supply.

A power supply is divided into the following parts,

Transformer – Normally a step-down one is used in many cases to step down high voltage AC mains to low voltage AC.

Rectifier – A circuit that converts input AC to DC, but the DC output is variable.

Smoothing– Performed by a large value electrolytic capacitor that is connected across the DC supply to smooth the DC from varying greatly to a small ripple.

Regulator – Its main task is to eliminate the ripple by setting DC output to a fixed voltage.

Types of Power Supplies

After getting acquainted with the building blocks of a typical power supply, one must also be aware of the types of power supplies that are available in the market and what’s the difference in their structure entails.

There are mainly three types of power supply that can be used since each one comes with its own set of advantages and disadvantages and is, therefore, each one is used under slightly different scenarios.

Major types of Power Supply in Electronics include:

Rectified or Smoothed Power Supply: According to this type, these power supplies come under the simplest types, and are used for non-critical applications wherein performance is not an issue.

Linear Regulated Power Supply:  This type of power supply provides a very high level of performance. Though, it uses a series regulator element that can be comparatively inefficient, as it dissipates a significant proportion of the input power as heat, these power supplies offer very high levels of regulation having low values of ripple.

Switch-Mode Power Supply: In this type, electronics circuits use switching technology to regulate their output. Despite providing spikes in their output, these power supplies offer very high levels of efficiency and can be contained in much smaller packages, unlike their linear equivalents.

Why Do We Need a Stable Power Supply and How to Select them?

Electronics Power SupplyWhy: The answer to this simple question lies in the irregularities an electronic device faces if a stable power supply is not used. Poor quality or fluctuating power supply causes power surges, cuts and even spikes that will eventually result in either flickering lights, interference in TV reception or failure of electronic equipment in the end.

Though amusing, one can only appreciate a good thing if one knows the bad side of not having it. Similarly, in the case of Power Supply in Electronics, the impact of bad power supply on electrical systems can disrupt power in the equipment resulting in operational delays, equipment instability as well as failure.

The poor power quality of Power Supply in Electronics also causes higher energy costs due to the inefficient use of power.

How: Addressing our second query is more significant since one needs to know the exact specification their device requires to provide their highest efficiency.

The decision to buy or select a suitable power supply depends on three major things:

  • Power output
  • Efficiency
  • Manufacturer

Since, Power supply in Electronics mainly operates within some specific perimeters these above-mentioned points should always be taken into account before selecting the perfect one!


Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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