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What is the full form of SMPS?

Full form of SMPS: Here, we are going to learn about the SMPS, full form of SMPS, overview, how does SMPS work, advantages, disadvantages, etc. By Anushree Goswami Last updated : March 30, 2024

SMPS: Switched-Mode Power Supply / Switching Mode Power Supply

SMPS is an abbreviation of Switched-Mode Power Supply. It is also called as "Switching Mode Power Supply". It is an electronic mode of power supply that uses a switching regulator to switch electrical power proficiently. To switch the voltage into the computer satisfactory range, it is a power supply unit (PSU) commonly used in computers.

This SMPS has the power management electronic mechanism that converts electrical power proficiently. Switched Mode Power Supply uses an enormous power alteration method to diminish in general power loss. When higher effectiveness, smaller size or lighter weight is needed, switching regulators are used as replacements for linear regulators.

Between different electrical configurations, an SMPS changes output voltage and current by switching ideally lossless storage fundamentals, such as inductors and capacitors. Ideal switching fundamentals estimated by transistors managed outside of their active mode, which have no resistance when "on" and hold no current when "off", and this is the reason, converters with ideal mechanism would function with 100% effectiveness, in other words, all input power is supplied to the load; no power is exhausted as dissipated heat. In actuality, these ideal mechanisms do not exist, this is the reason a switching power supply cannot be 100% proficient, but over a linear regulator, it is still an essential enhancement ineffectiveness.

How does SMPS work?

The switching regulators are used in the SMPS device that switches the load current on and off to manage and stabilize the output voltage. The production of suitable power for a device is the mean of the voltage between on and off. Different from the linear power supply, the pass transistor of SMPS switches between low dissipation, full-on and full-off mode, and spends very less time in the high-dissipation transitions, which diminishes exhausted energy.

Advantages of SMPS

• The size of the switch mode power supply is small.
• The weight of the SMPS is very light.
• Normally 60 to 70 percent is SMPS power efficiency, which is better for use.
• Anti-interference is strong in SMPS.
• The output range of SMPS is wide.

Disadvantages of SMPS

• The complexity of the switch-mode power supply (SMPS) is very high.
• The output ripple in SMPS is very high and its management is inferior.
• The use of SMPS can only be a step-down regulator.
• The output voltage is only one in SMPS.