Shielded Vs Unshielded Inductor Series Have Been#

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Of from 0.04 inches to 1.25 inches and in a shielded or unshielded version.Types of inductor kits. Typically this field is located in an air gap in the flux path of the inductor.When the source is digital logic or load switching and the inductor is in. An inductor is a device that stores energy within a magnetic field. The inductor wire is wound on the rod between the flat discs.

The I2R losses associated with the DCR consume some portion of the input power, and therefore, decrease overall efficiency and contribute to the temperature rise of the inductor. Although true saturation, when the inductor core can no longer contain the magnetic field, occurs at a higher current it is not worth the risk of exceeding these listed values.Secondly, it is important to consider the affects of the direct current resistance (DCR) of the inductor. Most magnetic vendors conservatively identify saturation current on their datasheets as the current at which the initial inductance of the part drops by 20% or 30%. It is important, however, to look more closely at several parameters before finalizing the selection.First, it is essential that the saturation current of the inductor be greater then the peak current in the application.

Shielded Vs Unshielded Inductor Series Have Been

The electrical performances given are for an ambient temperature of 25°C. Both unshielded and shielded drum inductors in Pulse's new SMT inductor series have been designed to work in an ambient temperature range of -40☌ to 125☌. These inductors are particularly suited to applications that allow a relatively large current ripple where the peak current will be higher than the RMS current.Finally, thermal performance is another criterion to consider in selection. Although application factors such as airflow and mounting will affect the temperature rise of the component, the heating current specifications provide an effective guideline.Some drum core inductors, especially the unshielded drums with the large air gap, have significantly higher saturation current than heating current. To assist in this analysis some magnetic vendors provide a heating current specification that represents the root mean square (RMS) or dc current which will cause a 30☌ to 40☌ rise in the component temperature above ambient. It is up to the circuit designer to determine if the efficiency losses associated with the DCR are acceptable.To determine if the DCR losses will cause the part to overheat it is essential to ensure that the temperature rise of the component added to the ambient temperature does not exceed the operating temperature of the inductor.

Pulse's Power Magnetics Catalog, which can be found on the Pulse website, can serve as a guide.