STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the spectrum of electronics applications and a leading supplier of audio ICs, has introduced a high-performance, analog class-D audio amplifier with best-in-class power density. This achievement will allow equipment manufacturers to combine superior audio quality with a small form factor in next-generation home and professional sound systems and active-speaker applications.
To maximize the speaker output power, sound-system
manufacturers require high-efficiency amplifiers capable of
driving speakers at low impedances of 2 or 3 ohms, which
creates a challenge by increasing device sizes. ST
designers have addressed this problem by managing to pack
320W of total output power - 160W on each channel - on an
area of 100 mm2, giving ST's newest analog audio class-D
amplifier a 20% power-density advantage over existing
solutions on the market.
device's high-current capability not only delivers high
output power, but also enables the design of platform
solutions where the speaker impedance can be simply changed
- from 8 down to 2 ohms - without any power or current
limitation.
ST's newest amplifier also integrates a host of features
that increase audio quality in the final application,
including built-in suppression of pop/click noises, standby
and mute functionality, and balanced input for best TDMA
(Time Division Multiple Access) noise rejection. The device
embeds smart current protection, which recognizes when the
speaker requires a peak of current for a specific frequency
range and automatically prevents any interruptions in the
sound flow.
amplifier offers flexible audio-system configuration, in
both stereo and mono modes, and also includes the mono
parallel feature for driving the subwoofer/woofer channel
in 2.1 sound set-ups. The device exhibits a signal-to-noise
ratio of 100dB and provides four selectable, fixed-gain
settings at 23.8dB, 29.8dB, 33.3dB and 35.8dB.
ST's TDA7498E dual-BTL (Bridge Tied Load) class-D audio
amplifier with a single power supply is sampling now and
volume production is scheduled for February 2012, with unit
pricing at $6 for volumes in the range of 1,000 pieces. If
your company has a high-volume need, please contact your ST
sales office.
About STMicroelectronics
STMicroelectronics is a global leader serving customers
across the spectrum of electronics applications with
innovative semiconductor solutions. ST aims to be the
undisputed leader in multimedia convergence and power
applications leveraging its vast array of technologies,
design expertise and combination of intellectual property
portfolio, strategic partnerships and manufacturing
strength. In 2010, the Company's net revenues were $10.35
billion. Further information on ST can be found at .
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