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Inductors: TDK launches automotive power-over-coax (PoC) inductors for up to 1600 mA

2025-03-21 | 返回

* Compatible with high currents of up to 1600 mA
* Ensures high impedance across a wide frequency range
* Suitable for high-temperature environments; supports a wide operation range of -55 °C to +155 °C

TDK Corporation announces the expansion of the ADL3225VF series (3.2 x 2.5 x 2.3 mm; L x W x T) of wire-wound inductors for automotive power-over-coax (PoC). Mass production of these new components began in March 2025.

Advanced driver-assistance systems (ADAS) are designed to enhance vehicle safety by using automotive cameras and sensors that monitor the driving environment. These systems rely on multiple cameras, typically installed at the front, rear, and sides of the vehicle, to capture real-time imagery for safe and secure driving. In standard configurations, automotive cameras require two separate lines for power and signal transmission: a power line connected to the vehicle’s battery and a signal line connected to the electronic control unit (ECU). However, with PoC technology, a single coaxial cable can simultaneously carry both power and data, simplifying and reducing cabling. This can reduce the vehicle’s weight, which in turn can improve fuel efficiency and lower carbon emissions.

TDK’s new ADL3225VF series implements a rated current of 1.6 A, which is equivalent to that of the ADL4532VK series (), while achieving a reduction in the mounting area of approximately 45%. The PoC system requires a filter incorporating multiple inductors to separate power from the data signal before processing effectively. In comparison with the conventional products, ADL3225VM-2R2M, the new ADL3225VF series increases the rated current by approximately 20% by using proprietary materials and structural design innovations. At the same time, the ADL3225VF series delivers high impedance across a wide frequency range from tens of megahertz (MHz) to hundreds of megahertz. This reduces the number of inductors used, saving space. Additionally, the inductor ensures high reliability with an upper operation temperature limit of +155 °C.

Looking ahead, TDK is committed to developing inductors for automotive PoC applications by pursuing optimized design by refining multilayer, wire-winding, and thin-film technologies to address market needs. TDK will expand its lineup of products to improve the quality of PoC transmission signals.

Glossary
* PoC: Transmission technology whereby both data and power are simultaneously transmitted over the same coaxial cable
* ADAS: Advanced driver-assistance systems
* ECU: Electronic control unit

Main applications
* PoC circuits for automotive cameras

Main features and benefits
* 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

Source：https://www.tdk.com/