ZXCD1210 Datasheet, PDF (1/8 Pages) Diodes Incorporated – High performance analog input Class D modulator

ZXCD1210
High performance analog input Class D modulator
Description
The ZXCD1210 provides complete control and
modulation functions at the heart of high
efficiency high performance Class D switching
audio amplifier solutions. In combination with
high performance output stages and open or
closed loop architectures, the ZXCD1210
provides a high performance audio amplifier
with all the inherent benefits of Class D.
The ZXCD1210 solution uses proprietary
circuit design to realise the true benefits of
Class D without the traditional drawback of
poor distortion performance. The combination
of reference circuit designs, magnetic
component choice and layout are essential to
realising these benefits.
The ZXCD1210 reference designs provide output
powers up to 500W RMS with typical distortion
and noise of less than 0.05% and a dynamic
range of 98dB. The closed loop designs ensure a
high damping factor and excellent supply
rejection. The open loop designs provide high
performance in the most economic
implementation.
The closed loop reference designs include
circuits specifically for subwoofer applications
featuring a flat frequency response up to 250Hz.
The open loop designs give the ZXCD1210 the
ability to produce amplifiers with full a 20kHz
bandwidth.
Features
• Output power 50W to 500W into 4⍀
• THD+N <0.05%
• Dynamic range 98dB
• Open loop and closed loop reference designs
• Frequency response
Subwoofers: ±0.5dB from 10Hz to 250Hz
Full band: ±0.5dB from 20Hz to 20kHz
• 200kHz PWM frequency
• Output drive free of crossover artifacts
• QFN16 4x4 package
Applications
• Subwoofers
• Home theatre systems
• Multimedia
• Wireless speakers
• Portable audio
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
100m 200m
500m
1
2
5
10
20
Output power (W)
50
100
200
500
This plot shows the
THD+N versus power
plot for a 500W closed
loop subwoofer
reference design.
THD+N is 0.02%
between 10W and
200W which is
outstanding
performance.
Issue 2 - October 2007
1
© Zetex Semiconductors plc 2007
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