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TAS3251

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175-W stereo, 350-W mono, 12- to 38-V supply, digital input Class-D Smart Audio Amplifier

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Data sheet

TAS3251

ACTIVE
Data sheet Order now

Product details

Audio input type Digital Input Architecture Class-D, Smart Amp Speaker channels (max) Stereo Control interface I2C Output power (W) 175 Power stage supply (max) (V) 38 Power stage supply (min) (V) 12 RDS(on) (Ω) 0.06 THD + N at 1 kHz (%) 0.01 Load (min) (Ω) 1 Analog supply voltage (min) (V) 10.8 Analog supply voltage (max) (V) 13.2 Rating Catalog Operating temperature range (°C) 0 to 70
Audio input type Digital Input Architecture Class-D, Smart Amp Speaker channels (max) Stereo Control interface I2C Output power (W) 175 Power stage supply (max) (V) 38 Power stage supply (min) (V) 12 RDS(on) (Ω) 0.06 THD + N at 1 kHz (%) 0.01 Load (min) (Ω) 1 Analog supply voltage (min) (V) 10.8 Analog supply voltage (max) (V) 13.2 Rating Catalog Operating temperature range (°C) 0 to 70
HSSOP (DKQ) 56 190.647 mm² (18.42 mm × 10.35 mm)
  • Flexible audio inputs
    • I2S, TDM, left-justified, right-justified
    • 32kHz, 44.1kHz, 48kHz, 96kHz
    • Supports 3-Wire Digital Input (No MCLK)
  • Total output power at 10% THD+N
    • 175W Stereo into 4Ω in BTL configuration
    • 220W Stereo into 3Ω in BTL configuration
    • 350W Mono into 2Ω in PBTL configuration
  • Total output power at 1% THD+N
    • 140W Stereo into 4Ω in BTL configuration
    • 175W Stereo into 3Ω in BTL configuration
    • 285W Mono into 2Ω in PBTL configuration
  • Advanced integrated closed-loop design
    • Ultra low 0.01% THD+N at 1W Into 4Ω
    • <0.01% THD+N to clipping
    • 60dB PSRR (BTL, no input signal)
    • <95µV Output noise (A-weighted)
    • >108dB SNR (A-weighted)
  • Fixed-function processing features
    • SmartEQ (up to 15x BiQuads per channel)
    • Crossover EQ (2x 5 BiQuads)
    • 3-Band advanced DRC + AGL
    • Dynamic EQ and SmartBass
    • Sample rate Conversion
  • Control features
    • I2C Software mode control
    • Address select pin
  • 90% Efficient class-D operation (4Ω)
  • Wide 12V to 36V supply voltage operation
  • Integrated protection with error reporting: undervoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown and dc speaker protection
  • Flexible audio inputs
    • I2S, TDM, left-justified, right-justified
    • 32kHz, 44.1kHz, 48kHz, 96kHz
    • Supports 3-Wire Digital Input (No MCLK)
  • Total output power at 10% THD+N
    • 175W Stereo into 4Ω in BTL configuration
    • 220W Stereo into 3Ω in BTL configuration
    • 350W Mono into 2Ω in PBTL configuration
  • Total output power at 1% THD+N
    • 140W Stereo into 4Ω in BTL configuration
    • 175W Stereo into 3Ω in BTL configuration
    • 285W Mono into 2Ω in PBTL configuration
  • Advanced integrated closed-loop design
    • Ultra low 0.01% THD+N at 1W Into 4Ω
    • <0.01% THD+N to clipping
    • 60dB PSRR (BTL, no input signal)
    • <95µV Output noise (A-weighted)
    • >108dB SNR (A-weighted)
  • Fixed-function processing features
    • SmartEQ (up to 15x BiQuads per channel)
    • Crossover EQ (2x 5 BiQuads)
    • 3-Band advanced DRC + AGL
    • Dynamic EQ and SmartBass
    • Sample rate Conversion
  • Control features
    • I2C Software mode control
    • Address select pin
  • 90% Efficient class-D operation (4Ω)
  • Wide 12V to 36V supply voltage operation
  • Integrated protection with error reporting: undervoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown and dc speaker protection

TAS3251 is a digital-input, high-performance Class-D audio amplifier that enables true premium sound quality with Class-D efficiency. The digital front-end features a high-performance Burr-Brown™ DAC with integrated DSP for advanced audio processing, including SmartAmp and SmartEQ. The first high-power single-chip solution reduces overall system solution size and cost. The DSP is supported by TI PurePath™ Console Graphical tuning software for quick and easy speaker tuning and control. The Class-D power stage features advanced integrated feedback and proprietary high-speed gate drive error correction for ultra-low distortion and noise across the audio band. The device operates in AD-mode and can drive up to 2 x 175W into 4Ω load and 2 x 220W into 3Ω load.

TAS3251 is a digital-input, high-performance Class-D audio amplifier that enables true premium sound quality with Class-D efficiency. The digital front-end features a high-performance Burr-Brown™ DAC with integrated DSP for advanced audio processing, including SmartAmp and SmartEQ. The first high-power single-chip solution reduces overall system solution size and cost. The DSP is supported by TI PurePath™ Console Graphical tuning software for quick and easy speaker tuning and control. The Class-D power stage features advanced integrated feedback and proprietary high-speed gate drive error correction for ultra-low distortion and noise across the audio band. The device operates in AD-mode and can drive up to 2 x 175W into 4Ω load and 2 x 220W into 3Ω load.
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Technical documentation

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* Data sheet TAS3251 175W Stereo, 350W Mono Ultra-HD Digital-Input Class-D Amplifier with Advanced DSP Processing datasheet (Rev. C) PDF | HTML Sep 4, 2025
Application brief Speaker, TV, Soundbar Audio Amplifiers: Features, Benefits, and Selection Guide PDF | HTML Mar 11, 2026
Application note Power Amplifiers for Constant Voltage Audio Systems PDF | HTML Sep 6, 2022
Technical article How smart amps are bringing high-fidelity audio into the smart home PDF | HTML May 3, 2021
Application note TAS3251 process flows (Rev. A) Jan 22, 2019

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Evaluation board

TAS3251EVM — TAS3251 175W Stereo / 350W Mono Ultra-HD Digital-In Class-D Evaluation Module

The TAS3251 Ultra-HD audio evaluation module demonstrates the TAS3251 integrated circuit from Texas Instruments. TAS3251 is a digital-input, high-performance Class-D audio amplifier that enables true premium sound quality with Class-D efficiency. The digital front-end features a high-performance (...)

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TAS3251-SW — TAS3251 Software

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Calculation tool

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Calculate and design audio Class-D LC filters in minutes using the Class-D LC Filter Designer.  Select from 4 different filter types based on Class-D output, switching topology and performance.  Input corner frequency and quality (Q) factor to fine tune the audio frequency (...)
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HSSOP (DKQ) 56 Ultra Librarian
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