Explain the operation of switched mode power supply in detail with a block diagram. List out the advantages of SMPS.

What is a Switched Mode Power Supply (SMPS)?

A switched mode power supply (SMPS) is an electronic power supply that efficiently converts electrical power from one voltage to another. It does this by storing energy in a magnetic field or capacitor, then releasing it in a controlled manner. SMPSs are used in a wide variety of applications, including computers, televisions, and cell phones.

How Does a SMPS Work?

A SMPS typically consists of the following blocks:

• Rectifier: The rectifier converts AC power from the mains supply to DC power.
• Filter: The filter removes any AC ripple from the DC power.
• Chopper: The chopper switches the DC power on and off at a high frequency.
• Transformer: The transformer steps up or down the voltage of the chopped DC power.
• Rectifier: The rectifier converts the AC power from the transformer back to DC power.
• Filter: The filter removes any AC ripple from the DC power.
• Output: The output is the DC power that is supplied to the load.

Advantages of SMPS

SMPSs offer a number of advantages over traditional linear power supplies, including:

• Efficiency: SMPSs are typically more efficient than linear power supplies, meaning that they waste less energy.
• Size and Weight: SMPSs are typically smaller and lighter than linear power supplies, making them easier to install and use.
• Reliability: SMPSs are typically more reliable than linear power supplies, as they have fewer components that can fail.
• Cost: SMPSs are typically less expensive than linear power supplies.

Conclusion

SMPSs are a widely used and efficient type of power supply. They offer a number of advantages over traditional linear power supplies, including efficiency, size, weight, reliability, and cost.