TDK High-Current Power Inductors Suit Automotive Power Circuits

TDK Corporation has started mass production of the new VLS5030EX-D type power inductor (5.3×5.0×3.0mm (L x W x H)). This model is part of the VLS-EX-D Series of wound ferrite power inductors automotive power circuits. Specifically, these compact components provide excellent DC superposition characteristics with an assured performance at temperatures of up to 150°C.

These inductors are suitable for headlights, airbags, electric power steering (EPS), advanced driver-assistance systems (ADAS). Also, they are designed for engine control units (ECUs) and various other power circuit applications.

VLS5030EX-D power inductor

Rise in In-Vehicle ECUs

Recently, the number of in-vehicle ECUs mounted under the hood has been increasing. They are for the electrification of various automotive control functions and infotainment, autonomous driving, and other applications. Also, the compact components support automotive power over-coax (PoC) implementations. Specifically, they feature an excellent DC superposition characteristic for transmitting data as well as supplying power, fulfilling the needs of, for example, ADAS that employ low-voltage differential signaling (LVDS) transmission. In addition, as the IC’s processing capability increases, a higher current is required, and the VLS-EX-D series contributes to these specifications.

The new VLS-EX-D Series of inductors achieves a higher-rated current compared to TDK’s standard VLS-EX-H Series. TDK’s innovative metallic magnetic material for the magnetic shielding function helped achieved these improvements. Specifically, for the VLS5030EX-D inductor, the rated Isat is 3.3A at 4.7μH, which is an increase of approximately 6 percent from standard parts of the same size. Moreover, the welding method used for connecting the wire winding to the external electrodes has implemented high reliability for reflow. The welding method also supported its use in high-temperature environments.

TDK will continue expanding the VLS-EX-D Series product portfolio. The company aims to cater to needs for a wide range of automotive applications, centering on ADAS, and will continue to meet the requirements of customers.

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