🔍 The Problem: Components Not Rated for High Frequency

Standard electrolytic capacitors or slow-switching transistors may work in linear circuits—but in high-frequency SMPS, they fall short. They generate more heat and ripple, reducing your circuit’s reliability and efficiency.

✅ The Solution: Use High-Frequency Rated Components

Choose ceramic capacitors (low ESR), ferrite-core inductors, and fast-recovery diodes or high-speed MOSFETs. These are designed to handle rapid switching without significant loss or EMI issues.

🔧 Practical Example

In a 12V to 5V buck converter switching at 200kHz, using a regular diode instead of a fast-recovery diode can cause heat buildup and drop efficiency below 70%. Replacing it with a Schottky diode boosts efficiency to 85%+, with cooler operation.

🧮 Sample Calculation

For a 1A load with 0.5V drop across a slow diode:

Power loss = 0.5V × 1A = 0.5W

A Schottky diode with 0.2V drop cuts this to 0.2W, saving energy and reducing heat.

🛍️ Product Suggestions

• High-Speed MOSFET

• Ferrite Core Inductor

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