Taiyo Yuden announces the NR6045T Series of 6mm x 6mm x 4.5mm height (max) wire-wound power inductors for DC-DC converter choke coil applications in LCD / plasma TVs and other flat panel displays (FPDs). The 14 models in the NR6045T series (see product table below) offer an excellent selection of low DC resistance (0.014 - 0.5 Ohms), high inductance (1.0 - 100µH) and high current ratings (0.8 - 8.5A). The NR6045T-100M device, for example, offers the industry's highest rated current (3.0A @ 10µH) in the 6mm x 6mm form factor. With the equivalent performance of larger 7mm to 10mm square devices, the 26% to 64% smaller footprint, respectively, of NR6045T series devices facilitates more compact DC-DC converters and thinner-profile product designs.
Due to the aggressive price/performance quest of the expanding global FPD market, greatly increased numbers of IC chips are now required for the I/O, image processing and information processing circuits of flat panel displays. Power supply circuits are likewise increasingly used for each IC chip to more efficiently use power and lower overall consumption as much as possible. These circuits, however, require costly multi-layer boards that have grown in size due to the increase in the number of power supply circuits, a factor that has also driven up FPD prices. This has resulted in a corresponding demand for choke coils-the main component in DC-DC converters-with higher current capacity, lower DC resistance (RDC) 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 the device's size very difficult.