Smart amplifier enables deeper, richer & louder audio

11th November 2015

Nat Bowers

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Datasheet

Enabling designers to develop next-gen smartphones with industry-leading audio quality at peak volumes while maximising battery efficiency, a low-power smart amplifier has been introduced by Texas Instruments. The TAS2555 Class-H audio amplifier with integrated speaker protection uses back electromotive force and low power of 5.7W to produce bigger sound from small devices.

According to the company, TI is the first in the industry to provide both integrated and non-integrated smart amplifiers, giving engineers a broad range of design options.

The TAS2555 is also the first low-power amplifier supported by the PurePath Console 3 software suite, which gives both advanced and beginner designers a path to meet diverse system requirements. The solution takes the guesswork out of speaker characterisation and includes easy-to-use tools for tuning and integration into end products, thus accelerating time-to-market for smartphones, tablets and other audio-enabled portable electronics.

Key features and benefits of the TAS2555 smart amplifier:

Louder and clearer audio: Offers 5.7W output power into 4Ω and 3.8W into 8Ω at 4.2V.
Low Idle-Channel Noise (ICN) simplifies designs: 15.9µV ICN eliminates audible speaker noise when using the smartphone in a receiver or pause mode and also eliminates the need for external components.
Integrated multilevel Class-H boost converter and automatic gain control: Dynamically adjusting audio output during periods of low battery voltage maximises battery life. User-specified boost control helps customise boost on/off based on end-equipment power profile requirements.
Reduces development time: Use any processor with an I²S output to enable on-chip speaker protection. This greatly reduces porting and integration time, enabling end equipment manufacturers to get to market faster.

TI offers a range of intuitive design tools for the TAS2555 smart amplifier to speed time-to-market and simplify evaluation. Along with the PurePath Console 3 software suite, TI offers a comprehensive EVM and a learning board tool for speaker evaluation. The TAS2555YZEVM is available for $149 from the TI store.

The TAS2555 smart amplifier is available now in a 3.47x3.23mm, 42-ball WCSP and is priced at $2.50 in 1,000 unit quantities.