Texas Instruments Incorporated (TI) (NYSE: TXN) introduced its next generation of high-performance digital amplifier power stages. The TAS5352 is capable of continuously driving two channels at 100 Watts (W), and the TAS5342 is capable of driving 125 W per channel at 10 percent total harmonic distortion plus noise (THD+N) into a 4-ohm load. Their high signal-to-noise ratio (SNR) of 98 dB allows manufacturers to meet consumer demand for high performance audio and home theater applications, such as high-power DVD receivers, home theaters in a box and mini component systems.
The TAS5352 and TAS5342 power stages are all pin-for-pin compatible with TI’s TAS5142DDV evaluation module, while providing additional benefits that ultimately lower system and manufacturing costs, including the following:
- Boot strap under-voltage protection allows higher modulation indexes
- Faster over-current (OC) detector allows inductors with lower saturation current to be used in the reconstruction filter
- Spike voltage reduced to improve reliability and reduce electromagnetic interference (EMI)
- Pin-to-pin short detector for detecting manufacturing errors like solder bridges
- Special ramping sequence to minimize pop/click when used in single-ended mode
TI’s proprietary current-limiting circuit manages over-currents, avoiding unnecessary shutdowns and protecting against short-circuit conditions. This feature allows the power stage to drive speakers with minimum audible artifacts during high-power peaks, and reduces the possibility of device shutdown during high-level music transients. The TAS5352 and TAS5342 also allow the engineer to program the OC level to customize this setting according to the filtering inductors used. In addition, the TAS5342L provides a lower-cost alternative, offering designers another performance option for applications, based on their system performance and cost requirements.
TI’s PurePath Digital(TM) Audio Technology
The TAS5352, TAS5342 and TAS5342L digital amplifiers are based on TI’s PurePath Digital technology, which allows consumer electronics manufacturers to build complete digital, end-to-end audio products with cutting-edge sound in a compact form factor. By reproducing movie soundtracks or music exactly the way the artist intended, PurePath Digital technology offers exceptional high-end digital entertainment to the everyday consumer. PurePath Digital technology complements other TI digital and high-performance analog products that support audio applications, such as digital signal processors (DSPs), switch mode power management, analog Class-D amplifiers and audio converters. TI provides the silicon, software, systems expertise and support for the entire audio signal chain, enabling customers to get to market quickly.
Availability, Packaging and Pricing
The TAS5352, TAS5342 and TAS5342L digital amplifier power stages are available now in 44-pin HTSSOP packages. Pricing in 1,000-unit quantities for the TAS5352 is $4.15 each, the TAS5342 is $3.95 and the TAS5342L is $2.95. The digital amplifier power stages are EMI-compliant when used with the appropriate system designs.
TI offers analog engineers a wide-ranging support infrastructure that includes training and seminars, design tools and utilities, technical documentation, evaluation modules, an online KnowledgeBase, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request.