MLJ-G Series Inductor

TDK Corporation's MLJ-G series multilayer inductors are targeted for use in automotive power-over-coax (PoC) implementations. The MLJ1608WG series inductors achieve a maximum impedance of 2,500 Ω. They also retain impedance levels of 1,000 Ω over a 300 MHz to 2 GHz frequency range. While the impedance characteristics of conventional multilayer inductors will vary considerably depending on the current applied and are not able to secure sufficient impedance, the MLJ1608WG series offers far less current variation. A high-rated current of 500 mA is supported despite these components having 1.6 mm (L) x 0.8 mm (W) x 0.8 mm (H) dimensions. This significantly reduces variation in impedance during the application of current. Moreover, these components deliver assured performance at temperatures of up to +125°C.

With the widespread uptake of advanced driver-assistance systems (ADAS), the performance of automotive cameras has advanced dramatically. Consequently, there are growing demands for higher-speed and larger-capacity interfaces. Automotive camera systems using LVDS transmission are adopting a PoC approach which superimposes data and power supply onto a single coaxial cable. By both transmitting data and supplying power, PoC reduces the number of wire harnesses required. This contributes to reducing the weight of the vehicle as well as allowing space savings to be realized. To separate data from the power supply in a PoC circuit, effective filtering is needed. This will generally consist of two to four inductors. Inductors used in such filters must have high impedance for AC components from low to high frequencies. By achieving impedance values of 1,000 Ω or higher over a broad range of frequencies, the MLJ1608WG series is highly optimized for meeting such requirements.