TAS2555

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5.7W Digital Input Smart Amp with Integrated Speaker Protection, Advanced EQ and 8.5V Class-H Boost

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Product details

Parameters

Audio input type Digital Input Architecture Class-D Boosted, Smart Amp Speaker channels (Max) Mono Power stage supply (Max) (V) 5.5 Power stage supply (Min) (V) 2.7 Load (Min) (ohms) 4 Output power (W) 5.7 SNR (dB) 111 THD + N @ 1 kHz (%) 0.02 Iq (Typ) (mA) 3 Control interface I2C, SPI Closed/open loop Closed Analog supply (Min) (V) 2.95 Analog supply (Max) (V) 5.5 Sampling rate (Max) (kHz) 96 PSRR (dB) 110 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Features

  • Ultra low-noise mono boosted class-D amplifier
    • 5.7 W at 1% THD+N and 6.9 W at 10% THD+N into 4-Ω load from 4.2-V supply
    • 3.8 W at 1% THD+N and 4.5 W at 10% THD+N into 8-Ω load from 4.2-V supply
  • Output noise for DAC + class-D (ICN) is 15.9 µV
  • DAC + class-D SNR 111 dB at 1%THD+N/8 Ω
  • THD+N – dB at 1 W / 8 Ω with flat frequency response
  • PSRR dB for 200 mVpp ripple at 217 Hz
  • Input sample rates from 8 kHz to 96 kHz
  • Built-in speaker sense
    • Measures speaker current and voltage
    • Measures VBAT voltage, chip temperature
  • Dedicated real-time DSP for speaker protection
    • Thermal and excursion protection
    • Detects speaker leaks and damage
  • High efficiency class-H boost converter with multi-level tracking
    • 86% at 500 mW in 8 Ω with 3.6 V VBAT
    • 87% at 700 mW in 8 Ω with 4.2 V VBAT
  • Configurable automatic gain control (AGC)
    • Limits battery current consumption
  • Adjustable class-D switching edge-rate control
  • Thermal, short-circuit, and under-voltage protection
  • I2S, Left-justified, right-justified, DSP, and TDM input and output interface,
  • I2C or SPI interface for register control
  • Stereo configuration using two TAS2555 devices
  • Power supplies
    • Boost input: 2.9 V to 5.5 V
    • Analog/digital: 1.65 V to 1.95 V
    • Digital I/O: 1.62 V to 3.6 V
  • 42-ball, 0.5-mm pitch, DSBGA package

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Description

The TAS2555 device is a state-of-the-art Class-D audio amplifier which is a full system on a Chip (SoC). The device features a ultra low-noise audio DAC and Class-D power amplifier which incorporates speaker voltage and current sensing feedback. An on-chip, low-latency DSP supports Texas Instruments SmartAmp speaker protection algorithms to maximizes loudness while maintaining safe speaker conditions.

The device can be used easily with any processor with an I2S output and stereo implementations are possible when using two TAS2555 devices. Separate tuning for different speakers is supported allowing customers to add value while maintaining form factor designs. Additionally, the TAS2555 supports separate voice and audio tuning dynamically with ultra-low 15.9 µV ICN regardless of mode of operation making receiver/speaker implementations possible.

A Class-H boost converter generates the Class-D amplifier supply rail. When the audio signal only requires a lower Class-D output power, the boost improves system efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When higher audio output power is required, the multi-level boost quickly activates tracking the signal to provide the additional voltage to the load.

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Download

To request access to PurePath™ Console 3 and other design resources: Request TAS2555

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 23
Type Title Date
* Datasheet TAS2555 5.7-W Class-D mono audio amplifier with class-H boost and speaker sense datasheet (Rev. B) Feb. 28, 2019
Application note Current and Voltage Sensing Accuracy and Linearity Jul. 21, 2020
Application note Limitations of Capacitor only EMI Filters on Class-D Amplifiers Jul. 21, 2020
Application note Requesting Access to Audio Software Jun. 18, 2020
User guide SmartAmp Learning Board 2 User's Guide (Rev. A) Sep. 13, 2019
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application note Passive Component Selection Guide for Class-D Audio Amplifier Jun. 27, 2019
Application note Battery Voltage Tracking Limiter and Brown-Out Protection Jun. 26, 2019
Application note PCB Layout Guidelines for TAS2xxx Series Class-D Boosted Audio Amplifier Jun. 06, 2019
Application note Benefits of Class-G and Class-H Boost in Audio Amplifiers Apr. 30, 2019
Application note PLL and Clocking Configuration for Audio Devices Mar. 26, 2019
Application note How the SmartAmp Speaker Protection Algorithm Compensates the Effects of Series Aug. 08, 2018
Application note SmartPA Speaker Protection Algorithm Aug. 06, 2018
Technical articles Don’t limit your audio: how to achieve loud sound from a small speaker Dec. 18, 2017
More literature Calibration and Verification Wave Files Sep. 21, 2017
Application note TAS2555 End System Integration Guide Sep. 08, 2017
Application note Smart Amp Tuning Guide Sep. 05, 2017
Application note TAS2555, TAS2557, and TAS2559 Factory Test and Calibration Guide Sep. 02, 2017
Application note Smart Amp Quick Start Guide Aug. 03, 2017
Technical articles Audio loudness and quality evaluations for smart amplifier solutions Jan. 22, 2016
Technical articles PurePath Console 3 gets fine-tuned! Nov. 11, 2015
User guide TAS2555 EVM User's Guide Sep. 18, 2015
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) May 01, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
999
Description

This board supports: TAS2555YZEVMTAS2557EVM and TAS2559EVM.

The Smart Amplifier Speaker Characterization Board, when used in conjunction with a supported TI Smart Amplifier and PurePath Console software, provides users the ability to measure speaker excursion, temperature and other parameters for (...)

Features
  • Easily and quickly characterize speakers
  • Quick connection to TI Smart Amplifier EVMs
  • Microphone included for SPL measurements
  • Laser input for speaker excursion measurements
EVALUATION BOARD Download
149
Description

To get started:

Step 1: Hardware
Order TAS2555YZEVM evaluation boardPP-SALB2-EVM learning board 

Step 2: Software
Request PurePath Console 3 (PPC3) control GUI, be sure to indicate you are working with the TAS2555YZEVM

Step 3: Training
Review training video for speaker characterization and read the Smart (...)

Features
  • TAS2555 5.7W Class-D Audio Amplifier w/ IV Sense
  • Reference speaker
  • USB cable
  • Access to TAS2555 App for PurePath Console 3

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
PurePath™ Console graphical development suite for audio system design and development
PUREPATHCONSOLE PurePath™ Console is a highly integrated and easy-to-use audio development suite designed specifically to simplify the evaluation, configuration and debug process associated with the development of audio products. Watch how easy it is to use the PurePath™ Console 3 software.

PurePath Console’s (...)

DRIVER OR LIBRARY Download
Android and other drivers for the TAS25XX and TAS27XX series of Class-D amplifiers
TAS2XXX-DRIVERS — These Android drivers support TI’s low power digital input Class-D audio amplifier devices. The "Get software" buttons link to git.ti.com repositories for these open-source drivers.
DRIVER OR LIBRARY Download
SLAC723.ZIP (65 KB)

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
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Ordering & quality

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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Videos

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