Low-loss power inductors improve efficiency at high frequencies

Moulded power inductors in the XEL50xx family by Coilcraft are claimed to offer “exceptionally low” DC resistance and low AC losses, to improve power converter efficiency at high frequencies (2.0 to 5.0MHz) and high ripple current.

The use of high switching frequencies or high ripple current allows a corresponding lower inductance value, which results in a physically smaller part for the same electrical specifications. The XEL50xx family inductors measure just 5.28 x 5.48mm with a maximum height of 3.2 mm.

The XEL50xx family is currently available in two models, the XEL5020 and XEL5030. A third model, the XEL5050 is expected late Q2 2018.

The XEL5020 is available in six inductance values from 0.10 to 1.0-microH, with current ratings up to 39A. The XEL5030 has 10 values from 0.13 to 4.7-microH and current ratings up to 44A. All models offer soft saturation characteristics to withstand high current spikes and have no thermal aging issues.

XEL50xx family inductors are qualified to AEC-Q200 Grade 1 standards (-40 to +125 degree C ambient) with a maximum part temperature of +165 degree C, making them suitable for automotive and other harsh-environment applications. The inductors also feature RoHS-compliant, tin-silver-over-copper terminations and are halogen-free. Their composite construction also minimises audible buzzing.

Free evaluation samples of the XEL50xx series are available online.

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