FFX: Full flexible amplification The world’s highest efficiency class-D amplifiers enabling audio application convergence

FFX: Full flexible amplification STMicroelectronics takes a step forward in the audio digital domain, enlarging the Sound TerminalTM product family already widely successful in all the traditional consumer electronics market segments (LCD and PDP TVs, audio for portable devices, home systems and set-top boxes). The new STA369BWS mainly addresses the emerging LED backlit ultrathin flat panel TVs. The devices are built around the FFX controller, a powerful and flexible solution capable of handling both analog and digital sources, delivering a very efficient digital stream to the speakers with audiophile...

Set-top boxes ST’s home entertainment capabilities span the complete spectrum of software and hardware, from the latest videoprocessing algorithms to the industry’s most advanced SoC devices, embedding best-in-class security and connectivity. In this context, audio and IC connection must be as easy as possible. ST audio ICs are designed to meet the needs for turnkey solutions and format change required by the set-top box market. Part number Short description Supply voltage Microcontroller -less 8 biquads/ch Multiband + EqDRC 8 biquads/ch Multiband + EqDRC Analog to digital converter with headphone...

STSpeakerSafe technology ST’s proprietary FFX technology is among the most efficient and successful IPs ever produced for digital audio amplification. Its highly sophisticated and advanced design has now been further improved to reduce the size of the external filtering circuitry (choke and capacitors), resulting in a reduced overall solution size and cost. In its full-fledged implementation, the company proprietary spread spectrum modulation (SSM) is used. Combined with the unique ternary modulation, this delivers unprecedented efficiency in full filterless configuration, still complying with...

In some applications, where space, or costing constraints are significant, the loudspeaker systems are often unable to reproduce the whole audio frequency spectrum with good performance. A good example of an application where both speaker size and cost are being squeezed is flat-screen televisions. This functional mode allows independent processing of high and low frequency content for each of the two L/R main channels. A single high-pass filter is used to extract the high frequency content. The low frequency part is obtained as a result of the difference between the input signal and its high-pass...

APWorkbench: audio-processor development environment STSpeakerTune: audio optimization technology ST’s Sound Terminal products provide highly-integrated audio amplifiers with utmost audio performances offered in reliable and robust monolithic devices. They are thus ideal for the latest generation of compact home systems, ultrathin flat-panel TVs and miniaturized portable and personal systems. Ongoing technological evolution in the electronics field is allowing increasingly complex functionalities to be built into very small and compact stylish applications. The latest generation of ultrathin...

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