Multilayer inductors for PoC applications in the automotive environment

Multilayer inductors for PoC applications in the automotive environment

New Products |
By Christoph Hammerschmidt

With new multilayer inductors, TDK Corp. aims to serve the increased demands in the automotive market. The new products offer high impedance over a wide frequency range, a compact form factor and lower impedance fluctuations compared to competitive products.

The MLJ1608WG series inductors are specifically targeted for power over coax (PoC) implementations in automotive applications. They achieve a maximum impedance of 2500 Ω and maintain impedance values of 1000 Ω over a frequency range of 300 MHz to 2 GHz. While the impedance characteristics of conventional multilayer inductors vary significantly with current and do not provide adequate impedance, the MLJ1608WG series offers much lower variation. Despite the compact size of 1.6 x 0.8 x 0.8 mm (LxWxH), a high rated current of 500 mA is achieved. This significantly reduces impedance fluctuations during current transmission. The devices can operate at temperatures up to 125 ℃ with a current of 400 mA.

With the widespread introduction of advanced driver assistance systems (ADAS), the performance of vehicle cameras has improved enormously. As a result, the requirements for faster and more powerful interfaces are increasing. Automotive camera systems with LVDS transmission take a PoC approach, with data and power running over a single coaxial cable.

Since both data and power are transmitted in the PoC process, the number of required vewrdings can be reduced. This helps to reduce weight and save space in vehicles. To separate the data from the power supply in a PoC circuit, effective filtering is required. This usually consists of 2 to 4 inductors. The inductors used must have high impedance values for AC components from low to high frequencies. By achieving impedance values of 1000 Ω or greater over a wide frequency range, the new MLJ1608WG series is optimized for these requirements.

TDK will continue to expand its product portfolio to meet future requirements for high-speed data transmission and even larger data volumes for a wide range of automotive applications.

More information here.

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