Difference Between Regulated and Unregulated Power Supply (With Table)

Anything that simply supplies electricity to any power supply and the electronic device may be generally described as the word power supply. A power supply is an electric or electronic device in its simplest sense, which transforms an accessible input CV voltage to the requested output DC or several DC outputs. For the intended operation, each electronic circuit or device requires a steady DC voltage.

The DC voltage you want is usually achieved by transforming the AC power or line voltage to a DC voltage. However, owing to fluctuations in load current, voltage differences, and atmospheric temperature, the DC voltage does not remain constant. An unregulated power supply is called a device because the output varies considerably while the load varies.

Regulated vs Unregulated Power Supply

The difference between regulated and unregulated power supply is that regulated power supply electronic devices may be supplied with controlled DC voltage by governed power supplies. No voltage control circuits are present in unregulated power supplies, so any change in the input AC is expressed in the output. Electric and electronic systems are powered by power supplies.

The regulated power supply has on its output voltage regulators. This means the controller ensures that irrespective of the current consuming the circuit, the output voltage will remain on the rated power supply value. Some changes in the input voltage are not caused by the regulator affecting the output voltage. This works until the system draws more than the rated power supply output current.

Unregulated power supplies are intended to generate a certain voltage at a certain current. In other words, uncontrolled power supplies have a continuous volume of power and use the fantastic electrical jargon again. As the output voltage rises, and vice versa, the power output is decreased; thus, the uncontrolled supply of power is always to meet the current and voltage needs of the power supply.

Comparison Table Between Regulated and Unregulated Power Supply

Parameters of Comparison Regulated Power SupplyUnregulated Power Supply
DefineRegulated power supply in electronic devices may be supplied with controlled DC voltage by governed power supplies.No voltage control circuits are present in unregulated power supplies, so any change in the input AC is expressed in the output.
OutputThe current drawn by the load is not the same as the voltage of the regulated power supply. In other words, the voltage is separate from the current load.The output voltage of an uncontrolled power supply always varies with the current, mostly because of the power supply’s high internal strength.
UtilizationThe regulated power supply can only be used for electronic devices like laptops, TVs, etc.Unregulated power can be used for electric devices such as DC motors, LED lights not vulnerable to minor voltage variations.
FareVoltage control circuits are comparatively expensive to manufacture in controlled power supplies. The regulatory supply of electricity is also costly.Unregulated power supplies are less expensive to manufacture because they have no regulated voltage.
VoltageMultiple outlet voltages can be supplied by a regulated power supply.The unregulated power supply needs a constant supply of voltage-independent of input voltage or loads current variations

What is Regulated Power Supply?

A Regulated Power Supply that produces a constant DC power supply or voltage, which is independent of the current drawn from the temperature on top of any changes of the AC voltage line, is a regulated electronic power supply. The word here governed refers to a device that retains a permanent output voltage, regardless of changes in the input voltage or frequency and regardless of changes in the output load. Simply placed, unchecked AC tension becomes continuous DC tension.

A system or circuit which is to run under defined power supply limits is supplied with stable voltage. The governed power supply produces a steady voltage in fancy electrical terminology, regardless of the power output present. Multiple outlet voltages can be supplied by a regulated power supply with multiple regulator units. Regulated energy supplies retain the optimal voltage level and, due to their smooth, consistent voltage delivery, are suitable for nearly all forms of electronic devices.

What is Unregulated Power Supply?

Contrary to the regulated power supply, an unregulated power supply’s output voltage isn’t controlled, so that the output voltage changes, so the load changes so that there is no voltage control. It has a continuous power supply. The input and charging voltage providing a fixed output, and even a small difference in the input influences the voltage directly. A converter, a rectifier, and a filter are used in an unregulated power supply. The ripple voltage is considered such small differences in the output voltage.

None of the electrical circuits work properly with the power supply unchecked. They need a constant supply of voltage-independent of input voltage or load current variations. A voltage stabilizer, known as a voltage regulator, is used for this purpose. Unregulated power supplies do not generate, as do regulated power supplies, a clean tension. Every change in the input voltage would be mirrored on the output voltage without a regulator to regulate the output voltage.

Main Differences Between Regulated and Unregulated Power Supply

  1. Voltage control circuits are comparatively expensive to manufacture in controlled power supplies, whereas unregulated power supplies are less expensive to manufacture because they have no regulated voltage.
  2. The current drawn by the load is not the same as the voltage of the regulated power supply, whereas the output voltage of an uncontrolled power supply always varies with the current, mostly because of the power supply’s high internal strength.
  3. The regulatory supply of electricity is also costly, whereas unregulated power supplies are less expensive.
  4. The regulated power supply can only be used for electronic devices like laptops, TVs, etc., whereas unregulated power can be used for electric devices such as DC motors, LED lights not vulnerable to minor voltage variations.
  5. Multiple outlet voltages can be supplied by a regulated power supply, whereas an unregulated power supply needs a constant supply of voltage-independent of input voltage or load current variations.

Conclusion 

Unregulated power supplies are cheap alternatives to the controlled power supply and are suitable for use in systems where the output voltage is not accurate. The main disadvantage, though, is that the output voltage varies as the input voltage or load current changes. You will want to use a regulated energy supply if you use devices that are vulnerable to load fluctuations, so it keeps the output constant regardless of any input changes. For all applications requiring an exact sum of output voltage, controlled power supplies are therefore used.

References

  1. https://www.sciencedirect.com/science/article/pii/S0048969716324998
  2. https://www.jstor.org/stable/43295727
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