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TI Introduces Class-D Audio Power Amplifier for Flat Panel Displays

Digital 20-W Amplifier Efficiently, Cost-Effectively Improves Audio Fidelity

May 31, 2005

DALLAS (May 31, 2005) -- Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today a complete digital-input Class-D audio power amplifier for flat panel displays, which enables designers to develop products with sound quality that matches the display´s high-quality image, while minimizing cost and component count. Ideal for 27 inch and larger flat panel displays, the new digital amplifier operates more efficiently than traditional linear amplifiers, minimizing heat and eliminating the space required for an external heat sink. It also minimizes overall power consumption, which helps reduce the transformer and regulator size and cost. (See www.ti.com/sc05123 for more information.)

The TPA3200D1 provides the key functions required by flat panel manufacturers, including both a digital interface and power amplifier. The device´s 250-kHz switching frequency oversamples the audio signal a minimum of 10 times to ensure high quality audio that is equal to or better than the linear amplifiers used in flat panels today. The TPA3200D1´s digital 24-bit I2S or 16-bit right-justified input connects directly to most audio processors and reduces layout concerns that can cause noise and affect signal integrity. 
The TPA3200D1 is available today in volume from TI and its authorized distributors in a 44-pin thin shrink small outline package (TSSOP). Suggested resale pricing in quantities of 1,000 is $2.95. An evaluation module is also available.

Key Features

  • Efficient Class-D operation 
  • Supports up to 24-bit I2S and 16-bit right-justified digital input formats 
  • Three integrated gain settings 
  • Thermal and short-circuit protection 
  • Requires no digital-to-analog converter 
  • Total harmonic distortion plus noise (THD+N) = 0.09 percent at 1kHz 
  • Power supply rejection ratio (PSRR) = -60 dB 
  • Soft mute 
  • Zero input detect output flag for power-conscious designs 
  • Power-saving shutdown mode

The

TPA3200D1

is part of TI´s complete portfolio of analog and digital products for audio applications. TI provides the silicon, software, systems expertise and support for the entire audio signal chain, enabling customers to get to market quickly. For an overview of audio products available from TI, please see the Audio Solutions Guide available at 

www.ti.com/audio

.