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.
Infotainment systems process high-speed digital signals for displays, audio, cameras, and connectivity. Noise from DC-DC power inductors can couple into data lines and clocks, causing image distortion,...
Read moreAutomotive Ethernet, SerDes camera links, and gateway modules rely on clean, stable power rails. Voltage ripple and magnetic interference from poorly selected inductors can increase jitter, packet errors,...
Read moreInfotainment and networking modules place DC-DC converters close to high-speed data traces and RF circuits. Shielded or molded inductors limit magnetic flux leakage, reducing EMI and protecting nearby...
Read moreHigh-speed links such as 100BASE-T1, 1000BASE-T1, LVDS, and SerDes operate with tight timing margins. Radiated or conducted noise from DC-DC inductors can increase bit-error rates, degrade eye diagrams,...
Read moreSoCs, GPUs, and network processors in head units and gateways draw rapidly changing current during video processing, wireless communication, and data routing. Inductors must maintain stable inductance...
Read moreWhen inductance drops under DC bias, ripple current increases, raising noise on power rails. In infotainment systems, this can translate into clock jitter, video noise, or degraded RF performance. Stable...
Read moreInfotainment units are densely packed and often enclosed in dashboards with limited cooling. High DCR increases copper loss and heat, which can reduce IC performance and long-term reliability. Low-DCR...
Read moreHigher switching frequencies allow smaller components but increase AC loss in inductors. If core or copper loss is too high, heat and noise rise, reducing system stability. Inductors must be matched to the converter’s...
Read morePlacement near Ethernet PHYs, camera connectors, or RF modules can amplify noise coupling. Using shielded inductors, short return paths, and proper grounding helps limit EMI propagation.
Read moreMolded inductors are preferred when low EMI, compact size, and stable magnetic performance are required—such as in gateways, digital cockpits, and camera interface modules where signal integrity is critical.
Read moreDC bias reduces the effective permeability of the magnetic core, causing inductance to drop as current increases. In industrial DC-DC converters with high load current, poor DC bias behavior can lead to higher...
Read moreLow DC resistance minimizes copper losses, reducing heat generation and improving overall system efficiency. In continuously operating industrial and energy systems, this directly impacts thermal management,...
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