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.
FEATURES
•
90% efficiency
•
External R
OSC
C
OSC
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)
•
Complete absence of crossover artifacts
•
OSC output available for sync in multi-channel
applications
•
Available in a 16 pin exposed pad QSOP package
•
Refer to ZXCD1000 data sheet for typical
characteristics and applications indormation
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.
APPLICATIONS
•
DVD receivers
•
Automotive audio systems
•
Home Theatre
•
Multimedia
•
Wireless speakers
•
Portable audio
•
Sub woofer systems
•
Public Address systems
ZXCD1010
ISSUE 4 - AUGUST 2007
1
HIGH FIDELITY CLASS D AUDIO AMPLIFIER SOLUTION
Distortion v Power (8⍀ open loop at 1kHz.)
