The Problem: Power Fluctuations and Limited Input Range

Most SMPS modules are rated for an input range like 100V–240V AC. But in real-life conditions—especially in rural or semi-urban areas—voltages can dip as low as 80V or spike above 250V. This causes the SMPS to malfunction or shut down entirely, putting your circuits at risk.

The Solution: Extend and Protect Your Input Range

To optimize your SMPS for wider voltage inputs:

• Add a varistor to absorb voltage spikes.

• Use a buck-boost converter to maintain a constant input to the SMPS, even when the supply fluctuates.

• For advanced users, consider integrating a MOSFET-based protection circuit for automatic switching.

Practical Example: Running IoT Devices in Semi-Urban India

Let’s say you’re running an Arduino-controlled irrigation system. Power drops to 90V in the evening. Your SMPS shuts down, and your system fails. By adding a Made in India buck-boost converter, your system keeps running smoothly with a regulated 230V input—regardless of the drop.

Sample Calculation: Sizing for Power Stability

Your device draws 12V at 2A = 24W.
If your buck-boost converter is 85% efficient:

Input Power = 24W / 0.85 = 28.24W
At 100V AC, input current = 28.24W / 100V = 0.28A

This helps size your input wires and protection components correctly.

Product Suggestion: Power Your Projects Smarter

Use these Made in India modules to solve the issue:

MOSFET Module for reliable switching

Voltage Regulator to stabilize your input

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