ZXCD1010 Просмотр технического описания (PDF) - Zetex => Diodes

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ZXCD1010

HIGH FIDELITY CLASS D AUDIO AMPLIFIER SOLUTION

Zetex => Diodes 

ZXCD1010

HIGH FIDELITY CLASS D AUDIO AMPLIFIER SOLUTION

DESCRIPTION

The ZXCD1010 provides complete control and

modulation functions at the heart of a high efficiency

high performance Class D switching audio amplifier

solution. In combination with matched output

magnetics and Zetex HDMOS MOSFET devices, the

ZXCD1010 provides a high performance Class D audio

amplifier with all the inherent benefits of Class D.

The ZXCD1010 is an enhanced version of the

ZXCD1000. The timing resistor for the oscillator is

taken off the chip enabling improved oscillator

frequency matching device to device.

The ZXCD1010 solution uses proprietary circuitry and

magnetic technology 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.

The ZXCD1010 reference designs give output powers

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

distortions 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, the residual distortion is almost

totally free of any crossover artifacts. This allows the

ZXCD1010 to be used in true hi-fi applications. This lack

of crossover distortion, sets the ZXCD1010 solutions

quite apart from most other presently available

solutions.

FEATURES

• 90% efficiency

• External ROSC COSC for improved accuracy

• 4 / 8 Ω drive capability

• Noise Floor -115dB for solution

• Flat response 20Hz - 20kHz

• High gate drive capability ( 2200pF)

• Very low THD + N 0.2% typical of full power up to

90% ( for the solution)

APPLICATIONS

• DVD receivers

• Automotive audio systems

• Home Theatre

• Multimedia

• Wireless speakers

• Portable audio

• Sub woofer systems

• Public Address systems

• Complete absence of crossover artifacts

• OSC output available for sync in multi-channel

applications

Distortion v Power (8⍀ open loop at 1kHz.)

• Available in a 16 pin exposed pad QSOP package

• Refer to ZXCD1000 data sheet for typical

characteristics and applications indormation

ISSUE 3 - NOVEMBER 2003

1

SEMICONDUCTORS

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