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Technical Articles
Browse selection guides, application notes and practical power supply articles. This layout follows the previous WordPress blog structure while preparing space for the larger article library.
Common-mode noise is one of the reasons a switching power supply can look clean on the schematic and still fail EMC testing. This guide explains where common-mode current is generated, how it couples through parasitic paths, and which EMC fixes usually work.
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Hard switching is simple and low cost, but MOSFET voltage and current overlap during transitions, creating loss that rises with frequency and bus voltage. Soft switching uses resonance to reduce voltage or current before the switching event, helping high-efficiency supplies reach higher power density with lower thermal stress.
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Choosing a switching power supply looks simple on paper. Match the output voltage, check the rated current, confirm the wattage, and the job should be done. In real projects, that is where many selection problems begin.
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Slow voltage drift in a switching power supply usually points to aging capacitors or a feedback-loop problem, not an immediate PWM controller failure. This guide explains how to diagnose the fault safely and verify the repair under load.
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Topology selection should start with input range, output voltage, current, power level, isolation, thermal limits, cost, size, and EMC risk. This guide explains how to shortlist non-isolated and isolated SMPS topologies for real industrial applications.
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Radiated EMI failures in switching power supplies usually start at the source: PCB hot loops, high dv/dt copper, poor return paths, transformer parasitic coupling, and leakage-inductance ringing. This guide explains how to locate the source by frequency range, improve PCB and transformer design, and use shielding or ferrites only after the main radiator is under control.
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