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Power inductors suit portable apps

Posted: 30 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:nr3012? power inductor? taiyo yuden?

The new NR3012 series of 3-by-3mm power inductors from Taiyo Yuden (U.S.A.) Inc. rounds out the company's low-profile wirewound inductor line for power circuit applications in battery-powered portable electronic equipment.

Now available in 65 different models in both 3-by-3mm and 4-by-4mm low-profile form factors, the 1.2mm height NR3012 series increases dc/dc converter design flexibility by allowing engineers to optimize inductor performance by choosing the best combination of case size, profile, current rating and resistance (Rdc) characteristics.

The 11 models in the NR3012 series offer a wide selection of the industry's highest conversion efficiency (lowest Rdc), rated current (250mA to 1,490mA) and inductance ratings (1?H to 47?H) for similar applications and component sizes, according to the company.

A key feature of the NR series is its capability to offer the highest current in the smallest available component size. The company attributes this to a combination of advanced material science and a new structural design. Instead of using conventional round drum/sleeve core technology, Taiyo Yuden developed a unique sleeveless square-core winding that eliminates all wasted space and thickens the lead wire inside the inductor to achieve the lowest possible Rdc, said the company.

In addition, the NR series' special ferrite-based resin covering further reduces component size and enables higher current. The sleeveless structure is also said to provide superior mechanical shock resistance. In drop tests onto concrete from 6 feet (1.8 m), NR series inductors experienced negligible failure rates due to cracking, disassembly or separation from the test PC-board.

All NR301x series wirewound power inductors are priced at 30 cents each. Delivery is two weeks.

- Gina Roos


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