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Home Applications Audio Press room Class D audio amplifier gives a virtuoso performance

Class D audio amplifier gives a virtuoso performance

December 2000

Class D audio amplifier gives a virtuoso performance Zetex has announced the first product in its new Class D audio amplifier family. The ZXCD1000 switching amplifier controller offers a winning combination of high efficiency, excellent audio quality, small size and low cost per watt.

Efficiency is excellent at greater than 90%. This enables a very compact solution to be generating much less heat than a comparable Class A/B linear amplifier which would typically have an efficiency of only around 65%. The high efficiency also means that a smaller power supply is required.

Aiming for world class performance, Zetex ZXCD1000 offers "best-in-class" THD + N (Total Harmonic Distortion and Noise) of typically 0.2% open loop at 1W into 4Ω

Zetex is also offering reference designs, which remove the layout and design difficulties traditionally associated with Class D amplifiers. The reference designs include application specific magnetics, specifically optimised to the system requirements. Overall solution cost has been minimised to offer a cost per watt that is substantially lower than competitive products.

Depending on the choice of output, the ZXCD1000 provides true high fidelity performance at an output power bridge configuration between 20W and 100W typically into a 4Ω or 8Ω load.

Due to the design of the IC, no dead time correction is required. This means that there are no high order crossover artifacts, thus maximising audio quality.

The new device is ideal for a wide range of audio applications, including DVD, home theater, powered speakers, PC multimedia, automotive audio, PA systems, and mini/micro hi-fi systems.