30-W stereo, 66-W mono, 8- to 26.4-V, digital input open loop Class-D audio amplifier w/ 2.1 support


Product details


Audio input type Digital Input Architecture Class-D Speaker channels (Max) Stereo Power stage supply (Max) (V) 26.4 Power stage supply (Min) (V) 8 Load (Min) (ohms) 2 Output power (W) 30 SNR (dB) 104 THD + N @ 1 kHz (%) 0.03 Iq (Typ) (mA) 27 Control interface Software Closed/open loop Open Analog supply (Min) (V) 3 Analog supply (Max) (V) 3.6 Sampling rate (Max) (kHz) 48 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

HTQFP (PHP) 48 49 mm² 7 x 7 open-in-new Find other Speaker amps


  • 2-Ch I2S Input; 8-kHz to 48-kHz fS
  • 30-W Stereo, 8 Ω/24 V (THD+N = 10%)
  • Up to 90% Efficient Operation
  • Wide 8-V to- 24-V Supply Range; 3.3-V Digital
  • Single-Device 2.1 Support (2 × SE + 1 × BTL)
  • 80-mΩ RDS(on) Device That Can Support 2-Ω SE
    and 4-Ω BTL Modes
    • 12 V, 2 Ω, 8 W With SE mode
    • 12 V, 4 Ω, 15 W With BTL mode
  • Speaker EQ (8 BQ per Channel), 2× DRCs
  • Pin-to-Pin Compatible With the TAS5727 and
  • Benefits:
    • Direct Connect to Digital Processor
    • High Output Power From a Standard Supply
    • Eliminates the Need for Heat Sink
    • Advanced Processing Improves Audio
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The TAS5731M is a 30-W, efficient, digital-audio stereo power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers.

The TAS5731M is a slave-only device receiving all clocks from external sources. The TAS5731M operates with a PWM carrier between a 384-kHz switching rate and a 352-kHz switching rate, depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

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Technical documentation

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Type Title Date
* Data sheet TAS5731M 2 × 30-W Digital Audio Power Amplifier With DSP and 2.1 Mode datasheet (Rev. C) Aug. 31, 2015
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 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 TAS5731EVM evaluation module demonstrates the capabilities TAS5731PHP. The TAS5731 is a 20W stereo class-D audio power amplifier with 2.1 Support. This EVM and accompanying materials allows the user to experiment with the 2.1 mode and 2.0 mode of operation, DRC, the programmable EQ, Digital THD (...)
  • 2.1 Channel evaluation module design
  • Self-contained protection systems and control pins
  • USB interface
  • Standard I2S data input using optical or coaxial inputs
  • Analog input through analog-to-digital converter
  • 2.1 Connection for satellite (x2) and subwoofer
  • Double-sided, plated-through PCB, 1oz copper, 2mm
  • (...)
  • Design tools & simulation

    SLOM267.ZIP (40 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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