Audio - Smart Amp

What are TI Smart Amps?

TI’s portfolio of Smart Amps build upon our standard Class-D audio amplifiers by providing advanced modeling and algorithms to fully understand the target speaker(s). This understanding allows TI Smart Amps to produce more robust and rich sound but without damaging the speaker from either heat or over excursion. TI’s Smart Amps fall into two categories.

  • The first is Predictive. Models of the speaker are created and audio is fed through these models to predict the speaker’s behavior. Predictive algorithms work well for larger speakers where the variations are smaller and operation is more linear. Even with larger speakers, we must account for the speaker variations in the headroom but the dynamic system can temporarily push the speakers to the limits to produce loud audio.
  • The second is Feedback. Feedback enabled Smart Amps add current and voltage (IV) sense to the DAC and Class-D of the Predictive solution. This IV-sense allows you to directly measure the speaker’s voice coil temperature and detect changes in the speaker due to unit to unit variations, temperature influence, and loading of the speaker. This information allows the algorithm to extract additional SPL from the speaker.

Showcasing low power audio Smart Amps and how to get BIG sound out of small speakers and devices. Smart Amps monitor the performance of your device’s speaker, to getting not only louder sound but richer sound with low frequency signals.

Conventional vs. Smart Amp systems

Conventional amp system

  • Does not support continuous speaker modeling and protection
  • Uses compression and clipping for protection, which leads to poor sound quality
  • Hard limits to prevent speaker damage

Smart Amp system

  • System supports continuous speaker modeling
  • Output power/peaks constantly optimized for maximum sound and reliability
  • Preserving peaks – better audio clarity
  • Excursion headroom used for improving bass

How Smart Amps protect

  • During operation a speaker is subject to voice coil heating and membrane excursion.
  • Based on advanced modeling of the loudspeaker’s mechanical, electrical and acoustical properties, Smart Amps can predict potentially dangerous situations, take timely precautions and ensure operation within the loudspeaker Safe Operating Area (SOA) at all times.

Features & Benefits of Smart Amps

System cost
  • Use smaller, lighter speakers
  • Higher linearity, dynamic range & sensitivity
  • Reduces overall system cost
Brilliant audio performance
  • Enables greater loudness & sound quality
  • Dynamic range: peaks are no longer compressed or limited
  • Ideal for space constrained designs
Real-time diagnostics
  • Continuous speaker diagnostics
  • Carefully managed temperature and excursion profiles
  • In-system tuning capable
Easy-to-use tools & software 
  • Easy to use, powerful GUI dramatically reduces development time
  • Enhances system reliability
  • Supports final production testing

What is a mid-power Smart Amp?

TI’s mid-power Smart Amp solutions allows an integrated, automated and holistic approach to modeling the speaker, while delivering stunning sound quality from smaller and smaller form-factors. This means that a 10W average speaker can be driven with a 300W amplifier without damage to the speaker! Peaks in the audio are no longer compressed/limited, giving the music far more depth and punch. Bass performance is enhanced by allowing much more fundamental bass frequencies to be reproduced, as the speaker and its temperature profile is carefully managed.

Mid-power Smart Amps utilize the Texas Instruments Predictive algorithm. Based on advanced modeling of the loudspeakers mechanical, electrical and acoustical properties, Smart Amps can predict potentially damaging situations and take timely precautions to ensure operation within the loudspeaker SOA at all times.

Predictive Smart Amp architecture

Featured Products
Device Description Order now Download datasheet Request EVM
TAS5766 20W Smart Amp Order now Download datasheet Request EVM
TAS5768 20W Smart Amp with Ternary Modulation Order now Download datasheet Request EVM

What is a low-power Smart Amp?

Low-power Smart Amps build upon the Predictive model by adding real-time, accurate voltage and current sensing to provide Feedback to the protection algorithm.

It is this Feedback that allows the device to monitor the speaker’s health and to optimize the sound quality. Feedback is imperative to get bigger sounds out of portable electronics as these applications utilize micro speaker solutions which have limited excursion capabilities. The Feedback also allows real-time temperature monitoring to insure the speaker does not overheat.

Texas Instruments low-power Smart Amp portfolio consists of both integrated and non-integrated solutions. Integrated devices include on-chip processing for a single system-on-chip solution that can connect to most host processors with an I2S interface. Non-integrated solutions include the same voltage and current sensing capabilities but require an off-chip processor to implement the speaker protection algorithm. Either solution can provide a superior sounding system when compared to standard Class-D amplifiers.

Feedback Smart Amp architecture

Featured Products
Device Description Order now Download datasheet Request EVM

Integrated Solution

TAS2555 5.7W Smart Amp w/ I-V sense and on-chip processing Order now Download datasheet Request EVM

Non-Integrated Solutions

TAS2552 4.0W Smart Amp w/ I-V sense Order now Download datasheet Request EVM
TAS2553 2.8W Smart Amp w/ I-V sense Order now Download datasheet Request EVM

What is PurePath™ Console 3?

With the release of Pure Path Console 3 (PPC3), developing products based on TI’s Smart Amps has never been easier. PPC3’s intuitive graphical user interface (GUI) steps users through the entire Smart Amp integration and development process. From demo to production, PPC3 is your single development tool.

  • Intuitive UI design and organization
  • Step-by-step wizards
  • Speaker characterization and system calibration
  • Device control and audio processing
  • Direct I2C and I2C monitor
  • Automatic notification for updates
  • Direct connect/recognition of supported TI EVMs
  • Easy to use, real-time application information supported via mouse-over and complete process walk-throughs