TI Boosts Portable Audio Performance With 2.7-W Constant Output Power Class-D Amplifier

TI Boosts Portable Audio Performance With 2.7-W Constant Output Power Class-D Amplifier

September 17, 2007

Small Size, Wide Voltage Range and Integrated Boost
Converter Simplify Design


    DALLAS, Sept. 17 /Xinhua-PRNewswire/ -- Texas
Instruments Incorporated (TI) (NYSE:TXN) today introduced a
monolithic, filter-free, Class-D audio power amplifier with
an integrated boost converter, which provides constant
output power for portable applications such as personal
navigation devices, PDAs, mobile phones, portable media
players and handheld gaming devices.  The combination of
the 2.7-Watt (W) Class-D amplifier and integrated boost
converter provides 85 percent overall efficiency, with
little heat dissipation, to prolong battery life when the
user is playing music or in a phone conversation.  (See
http://www.ti.com/tpa2013d1-pr .)

    (Logo:
http://211.154.41.99:9080/xprn/sa/20061107170439-20.jpg )

    The TPA2013D1 generates high output power from a low
supply voltage without distorting the audio, and can also
supply the power of external devices such as TI's
TPA2010D1, and other similar Class-D amplifiers.  The
device has a wide supply voltage operation of 1.8 volts (V)
to 5.5 V to simplify power supply design and allow for
direct connection to the battery. The new device provides a
maximum output power of 2.7 W across a 4-Ohm load or 2.2 W
across an 8-Ohm load in addition to providing an adjustable
constant output power of up to 1.5 W in the entire
Lithium-Ion battery range of 2.3 V to 4.8 V.  This
capability makes the audio output power insensitive to
battery voltage fluctuations, thereby maintaining audio
quality and volume as the battery discharges.

    The innovative design of the TPA2013D1 eliminates the
requirement for some external components enabling a total
solution size of just 6.5mm x 6.5mm, which includes the
amplifier, boost converter and external components.  This
represents a board area reduction of more than 50 percent
compared to typical solutions.  The combination of size,
features and performance reduces overall system cost and
allows for a sleeker, more differentiated end product.

    "Consumers expect smaller, more power-efficient
portable devices, including cellular phones, where future
battery voltages may go as low as 2.3 V next year and even
lower in 2009 and 2010," said Gary Reichmuth, TI's
manager of audio and imaging products, high-performance
analog.  "Benefiting from TI's in-depth systems
expertise, products like the TPA2013D1 allow end equipment
manufacturers to meet these consumer demands while
increasing performance and functionality."

    Several key features of the TPA2013D1 help increase
system audio quality. For example, all internal modules run
off the same reference clock, silencing potential audible
beat frequencies that could occur when using a separate
discrete amplifier and boost converter.  The synchronized
clock and very high power supply rejection ratio (PSRR), 95
dB at 217 Hz, serve to furtherreduce noise in the system,
avoiding "buzz" noises on amplifier outputs that
can often be generated from RF power amplifiers in GSM
phones, for instance.

    The TPA2013D1 provides thermal and short circuit
protection with an auto recovery option to ensure excellent
reliability and robust operation. The device's pinout has
been optimized to reduce EMI, providing easy layout and
meeting EMI requirements of the Federal Communications
Commission (FCC).

    The TPA2013D1 amplifier is optimized to work with other
products from TI's broad audio portfolio including portable
audio converters such as the TLV320AIC3106, the TLV320DAC32
digital-to-analog converter and the Aureus(TM) platform of
audio DSPs. TI provides the silicon, software, systems
expertise and support for the entire audio signal chain,
enabling customers to get to market quickly. For more
information see the Audio Solutions Guide at
http://ti.com/audio .  In addition, see TI's power
management products for portable consumer applications at
http://power.ti.com . 

    Pricing and Availability

    The TPA2013D1 Class-D audio power amplifier is
available now from TI and its authorized distributors in a
2.3-mm x 2.3-mm, 16-ball WCSP package or in a 20-pin, 4-mm
x 4-mm QFN package. Pricing in 1,000-unit quantities is
$1.55 for the WCSP and $1.45 for the QFN package.  Samples
and EVMs are available for 24-hour delivery through the TI
web site.For information on TI's complete analog design
support, and to download the latest Amplifier and Data
Converter Selection Guide, visit
http://www.ti.com/analogelab .

    Texas Instruments

    Texas Instruments Incorporated provides innovative DSP
and analog technologies to meet our customers' real world
signal processing requirements.  In addition to
Semiconductor, the company includes the Education
Technology business.  TI is headquartered in Dallas, Texas,
and has manufacturing, design or sales operations in more
than 25 countries.

    Texas Instruments is traded on the New York Stock
Exchange under the symbol TXN. More information is located
on the World Wide Web at http://www.ti.com .

    Trademarks

    Aureus is a trademark of Texas Instruments. All
registered trademarks and other trademarks belong to their
respective owners.


    For more information, please contact:

     Texas Instruments
     Janell Mirochna
     Tel:   [phone]
     Email: [e-mail]

     GolinHarris	
     Ramona Layne Long
     Tel:   [phone]	
     Email: [e-mail]