Chip Bead Inductors for Power Lines for LED Lighting

Taiyo Yuden Co. Ltd. has announced today the expansion of its line-up for its chip bead inductor FB series M type and the commercialization of FBMH4532MM182PT (4.5 x 3.2 x 3.2 mm) rated for 0.7A with a maximum dc resistance of 0.8Ω. The product is a noise suppression component for power-supply lines that carry a large current, such as ac-dc converters for home LED lighting.

The FB series M type chip bead inductors adopt a unique internal structure, which is optimized to have an impedance peak in the frequency range between 10- to 100-MHz. Impedance is 1,800Ω at a frequency of 10MHz and 10,000Ω at a frequency of 30MHz (values obtained under reference measurement conditions). This chip bead inductor is our new proposal for suppressing noise in power-supply lines at a frequency range from 10- to 100-MHz, which is a disadvantage seen with conventional inductors.

Production of the product began at the company’s Nakanojo Plant (Nakanojo-machi, Agatsuma-gun, Gunma Prefecture, Japan) in October 2016 at a rate of one million units per month. The sample price is 30 yen per unit.

Taiyo Yuden has optimized the internal structure of the FB series M type inductors used to suppress noise at frequencies of 100 MHz or higher, for the frequency range between 10- and 100-MHz, and has commercialized FBMH4532MM182PT, which can reduce noise in this range, a disadvantage seen with conventional inductors. To suppress noise in this frequency range, ac line filters or common mode choke coils have traditionally been used. These new inductors offer a solution for reducing size and weight in ac-dc converters.