13-06-2026
Hold-Up Time and Ride-Through: Surviving a Brown-Out
When the mains dips for a few milliseconds, hold-up time decides whether your kit stays alive. Here is how it works.…
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09-06-2026
Inrush Current: Why the Lights Dim at Switch-On (and What to Do)
That brief surge when a supply powers up can trip breakers and weld contacts — here is why it happens and how to tame it.…
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08-06-2026
Derating for Temperature and Altitude: Reading the Curve
A supply's full rating only holds up to a point - then you must derate. Here is how to read the curve and stay safe.…
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03-06-2026
How to Size a Power Supply: Continuous Load, Peak Load and Headroom
Add up the continuous load, allow for peak and inrush, derate for temperature, then leave some headroom — a practical method.…
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02-06-2026
Power Factor Correction: What It Is and When You Need It
PFC makes a supply draw current cleanly from the mains. Here is what it does and when the regs require it.…
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26-05-2026
How to Read a Power-Supply Datasheet: The Numbers That Matter
Input range, derating, hold-up, protections and approvals - what the spec sheet is really telling you.…
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