A new generation of compact wire-wound inductors is set to enhance automotive Power-over-Coax systems by reducing component count and supporting high-frequency performance beyond 1 GHz.
TDK Corporation has expanded its ADL4524VL series of wire-wound inductors, designed specifically for automotive Power-over-Coax (PoC) applications. With mass production already underway the new components (measuring just 4.5 x 2.4 x 2.6 mm) promise to significantly improve design efficiency in automotive camera systems and ADAS (Advanced Driver Assistance Systems).
Key benefits:
- High impedance across a wide frequency range (>1 GHz)
- Smaller design footprint with fewer components
- High thermal stability for automotive-grade environments
The key innovation lies in the component’s wide frequency range—spanning from 10 MHz to over 1 GHz—which allows it to deliver high impedance characteristics. This enables engineers to reduce the number of inductors typically needed in PoC filter circuits. In many cases, a setup that once required three separate inductors can now operate with just one, significantly saving space and reducing the footprint.
PoC technology transmits both power and high-speed data through a single coaxial cable, simplifying in-vehicle wiring, lowering vehicle weight, and improving overall fuel and energy efficiency. However, such systems require effective filtering to separate power and signal. TDK’s proprietary materials and structural design ensure reliable performance and filtering accuracy, even under harsh automotive conditions.These inductors support an operating temperature range from -55 °C to +155 °C, making them well-suited for under-the-hood or exterior vehicle environments.
The new inductor lineup includes two initial models tailored for automotive Power-over-Coax applications. The first, offering 10 µH inductance, features a maximum DC resistance of 0.60 Ω and a saturation current (Isat) of 660 mA at 25 °C. The second model provides 18 µH inductance with a DC resistance of 0.80 Ω and a typical saturation current of 510 mA at 25 °C. Both are designed to meet the stringent requirements of in-vehicle systems such as camera modules and advanced driver-assistance systems (ADAS).
The company plans to advance PoC inductor technology by refining wire-wound, multilayer, and thin-film processes. This ongoing development aims to support the growing demand for higher signal integrity, miniaturization, and system integration in next-generation automotive electronics.
