Compact high-current chokes target automotive applications

Compact high-current chokes target automotive applications

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By Christoph Hammerschmidt

With the B82559A*A033 series, TDK presents new shielded Epcos ERU33 high-current chokes for through-hole mounting.  Target applications are mainly DC/DC converters in the automotive environment.

The new high-current chokes cover a range of inductance values from 3.2µH to 10µH. The six new types are designed for very high saturation currents from 32A to 83A at 100°C. The DC resistances are only 0.85mΩ or 1.2mΩ, depending on the type. Thanks to the flat wire winding, the chokes have very compact dimensions of only 33 x 33 x 15 mm. By thermally connecting the flat wire winding to the core, the large ferrite surface can be coupled to a heat sink for effective heat dissipation. In addition to the standard types, customised variants with other inductance values can also be developed.

The RoHS-compatible and AEC-Q200 REV D qualified inductors are designed for operating temperatures from -40°C to +150°C. Typical automotive applications are buck-boost chokes for DC-DC converters, e.g. for 48 V on-board power supplies or differential mode chokes in the input filter of onboard chargers. In industrial electronics, they can be used as storage and output chokes in high-current supplies and in PoL supplies.

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