TDK Corporation has expanded its family of flat wire inductors with the high-performance EPCOS ERUC23 coupled inductor series (B82559S*). In these components, two windings share a single magnetic core. The new series comprises six types, covering a coupled inductance range from 1,4 to 4,1 µH and saturation currents from 50 to 97 A.
The AEC-Q200-qualified and RoHS-compliant components, which can be picked and placed automatically, have dimensions of just 26,8 x 13,8 mm2, with heights varying between 13,7 and 14,0 mm depending on the type. They are specified for a wide temperature range from -40 to 150 °C, and depending on the type, the DC resistance of a single winding is 0,82 to 1,85 mΩ.
Coupled inductors are very versatile: They are suitable for dual-phase buck and boost converters as well as for buck/boost converters – particularly for hybrid voltage converters that convert 48 V to 12 V. Since the two windings are coupled, the ripple current is reduced, which improves efficiency. Using coupled inductors instead of two individual chokes saves significant space on the circuit board.
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