New Liqualloy-based power inductor offers industry-leading high efficiency performance

September 17, 2012 // By Paul Buckley
ALPS Green Devices Co., Ltd. has developed the GLMH Series Liqualloy Power Inductor which is ideal for mobile devices used for long periods.

Mobile computing devices such as ultrabooks and tablets now need the ability to run for long periods.  Mobile equipment needing 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.

ALPS Green Devices has responded by developing the GLMH Series Liqualloy Power Inductor which claims to offer industry-leading high efficiency.

Liqualloy, the inductor’s core material, is a magnetic amorphous alloy created through joint research between ALPS Electric and Tohoku University. The material 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.

The GLMH Series also 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.

The GLMH Series complements the popular GLMC Series and GLMD Series in a line-up tailored to address diverse market needs.


Samples will be available from September 2012.

For more information about the GLMH Series Liqualloy Power Inductor at