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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.
Excessive output ripple is rarely solved by adding the biggest capacitor that fits. This bench-ready guide shows how to identify the waveform mechanism, correct the measurement, and apply the right circuit or layout fix.
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A 24 V power supply can look suitable on a quotation and still struggle inside a warm control cabinet. Its continuous output rating may fall with temperature, a valve bank may pull the voltage down during switching, or an auxiliary rail may drift when the main load goes idle. Understanding the converter topology helps engineers ask better questions before those problems reach the machine.
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A switching converter can look perfectly reasonable on a schematic and still ring, overheat, fail EMC testing, or lose regulation on the first PCB. The difference is rarely mysterious. Fast current edges flow through real copper, vias, component leads, and capacitor connections. Those structures have resistance, inductance, and capacitance that the schematic does not show.
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A DC-DC converter can pass a room-temperature bench test and still oscillate after an output capacitor substitution or a change in customer load. When that happens, replacing compensation resistors at random makes the investigation difficult to reproduce. Start by identifying the instability, model the actual power stage, and adjust the loop with a measurable target.
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A replacement MOSFET fails the moment a repaired power supply starts. The transistor may have been correctly identified, yet the fault that overstressed it is still on the board. A damaged gate resistor, a defective clamp, or a broken current-sense connection can turn a straightforward component replacement into another failure.
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A 24 V power supply reads correctly on the bench, but the voltage falls when a motor drive, valve bank or downstream converter starts. Replacing it with a higher wattage model may hide the symptom. It can also leave the actual fault, such as a resistive connector or excessive startup current, untouched.
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