Power inductor offers 0.11 to 0.23 micro Henry in a 6.5×7.5×3.0mm package

Power inductor offers 0.11 to 0.23 micro Henry in a 6.5×7.5×3.0mm package

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By eeNews Europe

Enabling mobile equipment to run for a long time entails lowering the power consumption of not only the CPU and the various devices, but also the DC/DC converter, used to supply power after converting voltage. This creates a need for high-efficiency power inductors, which are used inside DC/DC converters. However, an issue with power inductors so far has been power conversion efficiency during low-load CPU operation. The GLMH Series Liqualloy power inductor employs an integrated coil-terminal structure, applying original technology for high-precision forging of thin coil wire. With the coil wire doubling as the terminals, DC resistance is reduced by 10 to 20% compared to conventional types with the same level of inductance.

This structure keeps DC resistance tolerance to a narrow ±5% and reduces heat generation during high-load operation, thereby further improving on the high current compatibility of earlier products. Liqualloy, the inductor’s core material, is a magnetic amorphous alloy created through joint research between Alps Electric and Tohoku University. It is drawing interest as a new magnetic material to use in place of the most common core material, ferrite, and the second most common, iron powder. Using Liqualloy as the inductor’s core material allows minimization of power loss during conversion, thereby enabling high efficiency especially during low-load operation. DC resistance ranges from 0.57 to 1.10 mΩ ±5%.

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