Automotive Power-Over-Coax Inductors

The wire-wound inductors support high currents, save space, and work in extreme temperatures, making automotive PoC systems safer and more efficient.

TDK Corporation has expanded its ADL3225VF series of wire-wound inductors for automotive power-over-coax (PoC) applications. Advanced driver-assistance systems (ADAS) enhance vehicle safety by using automotive cameras and sensors to monitor the driving environment. These systems typically use multiple cameras placed at the vehicle’s front, rear, and sides to capture real-time imagery. Traditional automotive camera setups require separate power and signal transmission lines—one connected to the vehicle’s battery and the other to the electronic control unit (ECU). PoC technology simplifies this by using a single coaxial cable for both power and data, reducing cabling, lowering vehicle weight, and improving fuel efficiency.

The wire-wound inductors suit automotive manufacturers, ADAS system suppliers, ECU developers, Tier 1 and Tier 2 suppliers, and OEMs and system integrators. The new series supports a rated current of 1.6 A, matching the ADL4532VK series while reducing the mounting area by about 45%. PoC systems require a filter with multiple inductors to separate power from data signals. Compared to the conventional ADL3225VM-2R2M, the new series increases the rated current by about 20% through proprietary materials and structural design improvements. 

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A few key features and benefits of the ADL3225VF series include:

• Compatible with high currents of up to 1600 mA, with the high functionality of automotive cameras
• Ensures high impedance across a wide frequency range, helping to reduce the number of inductors used and save space
• Suitable for high-temperature environments; supports a wide operation range of -55 °C to +155 °C

Additionally, it delivers high impedance across a wide frequency range, reducing the number of inductors needed and saving space. Additionally, it maintains high reliability with an upper operating temperature limit of +155 °C.