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TI power amplifier matches sound quality with high-quality image

Posted: 03 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:tpa3200d1? texas instruments? ti? audio power amplifier? amplifier?

The new digital-input Class-D audio power amplifier for flat panel displays from Texas Instruments Inc. (TI) enables designers to develop products with sound quality that matches the display's high-quality image, while minimizing cost and component count.

Designed for 27 inch and larger flat panel displays, this new digital amplifier operates more efficiently than traditional linear amplifiers, said TI. It minimizes heat, eliminates the space required for an external heat sink, and cuts overall power consumption, which helps reduce the transformer and regulator size and cost.

The TPA3200D1 provides the key functions required by flat panel manufacturers, including both a digital interface and power amplifier. The device's 250kHz 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 I?S or 16-bit right-justified input connects directly to most audio processors and reduces layout concerns that can cause noise and affect signal integrity.

Additional features of the new amplifier include a total harmonic distortion plus noise (THD+N) of 0.09 percent at 1kHz, power supply rejection ratio (PSRR) of -60dB, thermal and short-circuit protection, zero input detect output flag for power-conscious designs, a power-saving shutdown mode, and three integrated gain settings.

The TPA3200D1 is housed in a 44-pin thin shrink small outline package (TSSOP), with a suggested resale price of $2.95 in quantities of 1,000. An evaluation module is also available.

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