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A switching power supply, also known as a switched-mode power supply (SMPS), is an advanced electronic device designed to efficiently convert electrical energy from one form to another. Unlike traditional linear power supplies that rely on bulky transformers and dissipate excess heat, a switching power supply utilizes high-frequency switching techniques to regulate the output voltage. This innovative approach allows for higher efficiency levels ranging from 70% to over 90%, compared to the lower efficiency typically found in linear designs.

The heart of a switching power supply lies in its control circuitry, which intelligently adjusts the input voltage based on signal feedback and operates various components such as transistors and capacitors accordingly. By rapidly turning these components on and off at high frequencies, it achieves effective regulation while minimizing energy loss due to heat dissipation. Hence, a switching power supply not only provides smaller form factors but also enhances overall system performance by delivering stable voltages with reduced electrical waste.

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