DESCRIPTION

The ZXCD1000 provides complete control and

modulation functions at the heart of a high efficiency

high performance Class D switching audio amplifier

solution. In combination with Zetex HDMOS MOSFET

devices, the ZXCD1000 provides a high performance

audio amplifier with all the inherent benefits of Class D.

The ZXCD1000 solution uses proprietary circuit design

to realise the true benefits of Class D without the

traditional drawback of poor distortion performance.

The combination of circuit design, magnetic

component choice and layout are essential to realising

these benefits.

FEATURES

band ( for the solution)

applications

APPLICATIONS

The ZXCD1000 reference designs give output powers

up to 100W rms with typical open loop (no feedback)

distortion of less than 0.2% THD + N over the entire

audio frequency range at 90% full output power. This

gives an extremely linear system. The addition of a

minimum amount of feedback (10dB) further reduces

distortion figures to give < 0.1 % THD + N typical at

1kHz.

From an acoustic point of view, even more important

than the figures above, is that the residual distortion is

almost totally free of any crossover artifacts.

This

allows the ZXCD1000 to be used in true hi-fi

applications. This lack of crossover distortion, sets the

ZXCD1000 solutions quite apart from most other

presently available low cost solutions, which in general

suffer from severe crossover distortion problems.

ZXCD1000

ISSUE 2 - APRIL 2002

1

HIGH FIDELITY CLASS D AUDIO AMPLIFIER SOLUTION

Output Power

1W

5W

10W

Distortion v Power

8

Ω open loop at 1kHz.

The plot shows Distortion v Power into an 8

Ω load at

1kHz. This plot clearly demonstrates the unequalled

performance of the Zetex solution. Typical distortion of

0.05% at 1W can be seen with better than 0.15% at 10W.

Truly world class performance.