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A subset within the broad inductor category, power inductors operate as energy-storage devices.

Inductor losses may be estimated using readily available data from core and inductor suppliers along with the relevant power supply application parameters.Īn inductor consists of wire wound around a core of ferrite material that includes an air gap. Though determining these losses with precision can require complex measurements, an easier alternative exists. The power dissipated in the inductor arises from two separate sources: the losses associated with the inductor core and those associated with the inductor windings. For the PDF version of this article, click here.Ī switch-mode power supply incurs loss in many areas of its circuitry, including the MOSFETs, input and output capacitors, quiescent controller current and inductor.