Low-profile power inductors

15 October 2008 Power Electronics / Power Management

Taiyo Yuden has announced its new NR6028 series of 6 x 6 x 2,8 mm (l x w x h) wire-wound power inductors optimised for DC-DC converter choke coil applications in LCD/plasma TVs and other flat panel displays (FPDs). The 13 models in the series offer a combination of low DC resistance (0,013–0,6 Ω), high inductance (0,9–100 μH) and high current ratings (0,62–6,6 A).

Because of the advances in FPD technology, in which most ICs require their own power supply, there is ever greater demand for choke coils (a primary component in DC-DC converters) with higher current capacity, lower DC resistance and smaller physical size. Boosting current capability, however, requires increasing the size of the core and thickening the windings inside the inductor, both of which make reducing device size very difficult.

Taiyo Yuden responded to this challenge by improving the round drum/sleeve core technology used by conventional inductor designs. A unique sleeveless, square-core winding was developed for use in NR series inductors that successfully eliminates wasted space and thickens the lead wire inside the inductor to achieve low DC resistance.

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