Dual inductor cuts component count in Class D amplifiers

Designed to replace the two inductors required in an automotive Class D audio amplifier with a single device, the Vishay Dale IHLD-2525GG-5A reduces board space requirements and component counts while providing improved THD performance over other inductor types.

To provide noise filtering in Class D amplifiers, the AEC-Q200 qualified device consists of two IHLP inductors with operating temperatures up to +155 °C in one compact package.

The inductor features an optimised design that realises higher quality sound and lower distortion than other solutions while offering low coupling for minimal cross-talk between its integrated inductors.

Designed to operate at higher carrier frequencies up to 2.1 MHz, the IHLD-2525GG-5A delivers high efficiency with typical DCR from 7.06 mΩ to 154 mΩ and a wide range of inductance values from 1.0 µH to 22 µH.

The device provides rated current to 13.0 A and handles high transient current spikes without saturation.

Packaged in a 100 % lead (Pb)-free shielded, composite construction that reduces buzz to ultra-low levels, the dual inductor offers high resistance to thermal shock, moisture, and mechanical shock.

Samples and production quantities of the new dual inductor are available now, with lead times of 12 weeks for large orders.