Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPA3005D2 and TPA3008D2
Edited by the Electronicstalk Editorial Team on 24 May 2004
Audio amps keep their cool for LCD TVs
Two new stereo Class-D audio power amplifiers are aimed at applications in 17 to 23in LCD TVs
Providing LCD TV manufacturers with the feature set required to meet high efficiency audio demands, Texas Instruments has released two new stereo Class-D audio power amplifiers for 17 to 23in LCD TVs. The two new devices feature efficient Class-D operation, driving up to 10W of continuous stereo output power with no external heatsink, simplifying design and reducing component count, total system cost and space requirements for LCD TVs.
This article was originally published on Electronicstalk on 24 May 2004 at 8.00am (UK)
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'The TPA3005D2 and TPA3008D2 are examples of the simple strategy behind TI's Class-D audio power amplifier portfolio: listen to customers and provide what they need to succeed', said Art George, Vice President and General Manager of TI's High Performance Linear business.
'TI has worked with leading manufacturers of LCD-TVs such as Samsung Electronics Co to develop highly efficient Class-D audio power amplifiers that provide the performance, output power and features required by the flat panel TV market.
This relationship has resulted in devices that provide the best balance of performance, features and cost for the LCD TV market'.
The TPA3005D2 and TPA3008D2 are 92% efficient when driving 16ohm speakers.
Competing Class-D amplifiers operate 120% hotter, and competing Class-AB or linear amplifiers operate 140% hotter.
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The TI Class-D amplifiers' high efficiency results from their 250kHz pulse width modulated operation and extremely low output FET on resistance.
Competing solutions switch at higher frequencies or feature scaled-down output FETs, which cuts cost but reduces efficiency and increases heat.
TI provides the best balance of fidelity without high switching losses through the 250kHz switching frequency featured in the TPA3005D2 and TPA3008D2, while saving cost by providing the exact feature set the market requires.
The TPA3008D2 includes features that no other competitor provides at the same performance and price node such as four custom integrated gain settings, which eliminate external resistors, and an integrated auto recovery circuit that restarts the IC after a short circuit is cleared.
The TPA3005D2 and TPA3008D2 are the latest additions to the TPA3000D family.
Other Class-D amplifiers in the family include the feature-rich TPA3004D2, a 12W stereo amplifier with DC volume control and pre-outs for headphone drive, and the high-power TPA3001D1, a 20W mono audio power amplifier.
All TPA3000D amplifiers operate from a nominal 12V supply, have less than one percent total harmonic distortion plus noise (THD+N) at half the rated output power level and less than 10% THD+N at the maximum rated output level.
Furthermore, all the stereo TPA3000D audio amplifiers are in the same package with very similar pinouts to help minimise design effort when porting board layouts between projects.
The TPA3000D family is part of TI's complete offering of products focused on audio systems, including all-digital audio components as well as digital plus analogue audio solutions.
TI is able to shorten a manufacturer's time-to-market by offering world-class systems expertise, software and support.
The TPA3005D2 Class-D audio power amplifier is available now in a standard PowerPAD surface mount 48-pin quad flat pack (QFP) from Texas Instruments and its authorised distributors.
The TPA3008D2 will be available in June in a standard PowerPAD surface mount 48-pin QFP.
Suggested resale pricing in quantities of 1000 is $2.95 for the TPA3005D2 and $3.10 for the TPA3008D2.
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