4-W, digital/analog input smart amp with I/V sense for speaker protection & integ. 8.5-V boost


Product details


Audio input type Analog Input, Digital Input Architecture Class-D Boosted, Smart Amp Speaker channels (Max) Mono Power stage supply (Max) (V) 8.5 Power stage supply (Min) (V) 2.7 Load (Min) (ohms) 6 Output power (W) 4 SNR (dB) 94 THD + N @ 1 kHz (%) 0.1 Iq (Typ) (mA) 6.54 Control interface I2C Closed/open loop Closed Analog supply (Min) (V) 2.7 Analog supply (Max) (V) 5.5 Sampling rate (Max) (kHz) 192 PSRR (dB) 75 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

DSBGA (YFF) 30 6 mm² 2.895 x 2.615 open-in-new Find other Speaker amps


  • Analog or Digital Input Mono Boosted Class-D
  • 4.0 W into 8 Ω Load from 4.2 V Supply (1%
  • Efficiency of 85% at Rated Power
  • I2S, Left-Justified, Right-Justified, DSP, PDM, and
    TDM Input and Output Interface
  • Input Sample Rates from 8 kHz to 192 kHz
  • High Efficiency Class-G Boost Converter
    • Automatically Adjusts Class-D Supply
  • Built-In Speaker Sense
    • Measures Speaker Current and Voltage
    • Measures VBAT and VBOOST Voltages
  • Built-In Automatic Gain Control (AGC)
    • Limits Battery Current Consumption
  • Adjustable Class-D Switching Edge-Rate Control
  • Power Supplies
    • Boost Input: 3.0 V to 5.5 V
    • Analog: 1.65 V to 1.95 V
    • Digital I/O: 1.5 V to 3.6 V
  • Thermal and Short-Circuit Protection
  • I2C Interface for Register Control
  • Stereo Configuration Using Two TAS2552s
    • I2C Address Select Terminal (ADDR)
  • 2.855 mm × 2.575 mm, 0.4 mm Pitch 30-Ball
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The TAS2552 is a high efficiency Class-D audio power amplifier with advanced battery current management and an integrated Class-G boost converter. The device constantly measures the current and voltage across the load and provides a digital stream of this information.

The Class-G boost converter generates the Class-D amplifier supply rail. During low Class-D output power, the boost improves efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When high power audio is required, the boost quickly activates to provide significantly louder audio than a stand-alone amplifier connected directly to the battery.

The AGC automatically adjusts Class-D gain to reduce battery current at end-of-charge voltages, preventing output clipping, distortion and early system shutdown. The fixed gain is adjustable via I2C. The gain range is –7 dB to +24 dB in 1 dB steps.

In addition to a differential mono analog input, the TAS2552 has built-in a 16-bit D/A converter used with a digital input. Moving the D/A converter from the digital host processor into the integrated amplifier process provides better dynamic performance at lower system cost. Additionally, since the PCB routing is digital rather than analog, sensitivity to external perturbations such as GSM frame-rate noise is decreased at the system level.

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Technical documentation

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Type Title Date
* Data sheet TAS2552 4.0-W Class-D Mono Audio Amplifier with Class-G Boost and Speaker Sense datasheet (Rev. B) Apr. 30, 2015
Technical article How smart amps are bringing high-fidelity audio into the smart home May 03, 2021
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019
Application note PLL and Clocking Configuration for Audio Devices Mar. 26, 2019
User guide TAS2552 EVM User's Guide (Rev. A) Jul. 31, 2015
Application note Inductor Selection for the TAS2552 Boosted Class-D Amplifier (Rev. A) May 14, 2014
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) May 01, 2013

Design & development

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Hardware development

document-generic User guide

The TAS2552EVM is a USB audio amplifier with an IV feedback, Boosted Class-D mono amplifier. Together with the TAS2552 control software and a customer supplied speaker and power supply, it allows easy evaluation of the TAS2552 audio amplifier. The TAS2552 control software is compatible with Windows (...)

  • TAS2552 Boosted Class-D amplifier
  • TAS1020B USB controller / interface
  • Control Software for easy evaluation
  • TLV320AIC3253 miniDSP codec

Software development

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 (...)
Linux Driver for TAS2552
TAS2552SW-LINUX The Linux driver supports the TAS2552 4.0-W Class-D Mono Audio Amplifier with Class-G Boost and Speaker Sense. The Linux driver supports communication through the I2C bus and interfaces with the Linux DAPM (Dynamic Audio Power Management for Portable Devices) class.
Linux Mainline Status

Available in (...)

SLAC655.ZIP (2619 KB)

Design tools & simulation

SLAM199.ZIP (69 KB) - IBIS Model
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 (...)
  • 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
  • (...)

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