FAQ
Technical FAQs for Power Magnetics
This FAQ hub answers the most common technical questions from power engineers, buyers, and sourcing teams—covering topics such as inductance behavior, saturation current, core materials, EMI, reliability, and production processes.
All answers are written to support application-based design decisions and guide users toward the most suitable Coilmaster solutions.
For safety, surge protection, and ground-loop prevention.
Read morePower injection increases conducted and radiated emissions.
Read moreHeating changes impedance and increases signal distortion.
Read moreEthernet speed, PoE class, cable length, and EMC limits.
Read moreHigh-frequency VRM switching, fast load transients, and coupling through dense power planes.
Read moreIt can raise rail impedance and interfere with control-loop response during load steps.
Read moreThey reduce noise traveling between modules and limit conducted EMI returning to the bus.
Read moreThey reduce leakage field coupling into sensitive SerDes, clocks, and memory interfaces.
Read moreConducted EMI spreads through power lines; near-field coupling injects noise directly into nearby traces and components.
Read moreHigher temperature increases loss and reduces inductance margin, which can raise ripple and worsen EMI.
Read moreRail voltage/current, switching frequency, transient profile, target noise band, layout constraints, and thermal limits.
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