Inductors for automotive ADAS power over coax
TDK has launched a new family of wire winding inductors for automotive power-over-coax (PoC) filter applications.
The ADL4532VK series inductors measure 4.5 x 3.2 x 3.2 mm in ADAS advanced driver-assistance camera power designs.
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.
The PoC system requires a filter incorporating multiple inductors to effectively separate power from the data signal before processing.
The TDK ADL4532VK series delivers high impedance across a broad frequency range from tens of megahertz (MHZ) to hundreds of megahertz by using proprietary materials and structural design innovations. This reduces the number of inductors used, saving space.
The inductors are compatible with high currents of up to 1650 mA and meets the needs for high functionality, including not only the latest automotive cameras but also the infrared cameras and display. The inductor ensures high reliability with an upper operation temperature limit of +155 °C.
|
Type |
Inductance |
DC resistance (max.) [Ω] |
Isat (typ.,25°C) [mA] |
Itemp (typ., 105 °C) [mA] |
Itemp (typ., 125 °C) [mA] |
|
ADL4532VK-3R0M-TL000 |
3.0 |
0.125 |
2100 |
1650 |
1300 |
|
ADL4532VK-100M-TL000 |
10.0 |
0.235 |
1250 |
1200 |
940 |
|
ADL4532VK-160M-TL000 |
16.0 |
0.470 |
950 |
830 |
640 |
Isat (25 °C): Current value based on inductance variation (30% lower than the initial inductance value)
Itemp (105 °C): Current value based on temperature increase (temperature increase of 50 K by self-heating)
Itemp (125 °C): Current value based on temperature increase (temperature increase of 30 K by self-heating)
Mass production began in February 2025.
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