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TPA3255-Q1

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Automotive, 315-W, 2-ch, 18- to 53.5-V supply analog input Class-D audio amplifier

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Data sheet

TPA3255-Q1

ACTIVE
Data sheet Order now

Product details

Output power (W) 315 Power stage supply (max) (V) 53.5 Power stage supply (min) (V) 18 Speaker channels (max) 4 Audio input type Analog Input Control interface Hardware THD + N at 1 kHz (%) 0.006 Switching frequency (max) (Hz) 450000 Output noise voltage (µV) 85 Rating Automotive Operating temperature range (°C) -40 to 105
Output power (W) 315 Power stage supply (max) (V) 53.5 Power stage supply (min) (V) 18 Speaker channels (max) 4 Audio input type Analog Input Control interface Hardware THD + N at 1 kHz (%) 0.006 Switching frequency (max) (Hz) 450000 Output noise voltage (µV) 85 Rating Automotive Operating temperature range (°C) -40 to 105
HTSSOP (DDV) 44 113.4 mm² 14 x 8.1
  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 2: –40°C to +105°C, TA
  • Differential Analog Inputs
  • Total Output Power at 10% THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 180-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1% THD+N
    • 255-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 495-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    • Signal Bandwidth up to 100 kHz for High Frequency Content From HD Sources
    • Ultra Low 0.006% THD+N at 1 W into 4 Ω and <0.01% THD+N to Clipping
    • >65 dB PSRR (BTL, 1 kHz, No Input Signal)
    • <85 µV (A-Weighted) Output Noise
    • >111 dB (A Weighted) SNR
  • Multiple Configurations Possible:
    • Stereo, Mono, 2.1 and 4xSE
  • Click and Pop Free Startup and Stop
  • 90% Efficient Class-D Operation (4 Ω)
  • Wide 18-V to 53.5V Supply Voltage Operation
  • Self-Protection Design (Including Undervoltage, Overtemperature, Clipping, and Short Circuit Protection) With Error Reporting
  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 2: –40°C to +105°C, TA
  • Differential Analog Inputs
  • Total Output Power at 10% THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 180-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1% THD+N
    • 255-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 495-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    • Signal Bandwidth up to 100 kHz for High Frequency Content From HD Sources
    • Ultra Low 0.006% THD+N at 1 W into 4 Ω and <0.01% THD+N to Clipping
    • >65 dB PSRR (BTL, 1 kHz, No Input Signal)
    • <85 µV (A-Weighted) Output Noise
    • >111 dB (A Weighted) SNR
  • Multiple Configurations Possible:
    • Stereo, Mono, 2.1 and 4xSE
  • Click and Pop Free Startup and Stop
  • 90% Efficient Class-D Operation (4 Ω)
  • Wide 18-V to 53.5V Supply Voltage Operation
  • Self-Protection Design (Including Undervoltage, Overtemperature, Clipping, and Short Circuit Protection) With Error Reporting

TPA3255-Q1 is a high performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath™ Ultra-HD). This technology allows ultra low distortion across the audio band and superior audio quality. The device is operated in AD-mode, and can drive up to 2 x 315 W into 4-Ω load at 10% THD and 2 x 150 W unclipped into 8-Ω load and features a 2-VRMS analog input interface that works seamlessly with high performance DACs such as TI’s PCM5242. In addition to excellent audio performance, TPA3255-Q1 achieves both high power efficiency and very low power stage idle losses below 2.5W. This is achieved through the use of 85-mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.

TPA3255-Q1 is a high performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath™ Ultra-HD). This technology allows ultra low distortion across the audio band and superior audio quality. The device is operated in AD-mode, and can drive up to 2 x 315 W into 4-Ω load at 10% THD and 2 x 150 W unclipped into 8-Ω load and features a 2-VRMS analog input interface that works seamlessly with high performance DACs such as TI’s PCM5242. In addition to excellent audio performance, TPA3255-Q1 achieves both high power efficiency and very low power stage idle losses below 2.5W. This is achieved through the use of 85-mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.

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* Data sheet TPA3255-Q1 315-W Stereo, 600-W mono PurePath™ ultra-HD analog-input datasheet (Rev. A) PDF | HTML 15 Mar 2019
Application note Class-D Amplifier External Load Diagnostics (Rev. A) PDF | HTML 17 Jul 2025
Application note TPA324x and TPA325x Post-Filter Feedback (Rev. A) 07 Mar 2018
Application note Multi-Device Configuration for TPA32xx Amplifiers 27 Sep 2017
More literature TI Automotive External Amplifiers (Rev. A) 03 Feb 2017
Application note LC Filter Design (Rev. A) 09 Nov 2016
Application note TPA32xx Analog Input Grounding for Single Ended Inputs PDF | HTML 26 Aug 2016

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Evaluation board

TPA3255EVM — TPA3255 315W Stereo / 600W Mono Ultra-HD Analog-In Audio Class-D Module

The TPA3255EVM Ultra-HD evaluation module demonstrates the TPA3255DDV integrated circuit from Texas Instruments. The TPA3255DDV is a high-performance Class-D amplifier that enables true premium sound quality with high efficiency class-D technology. It features an advanced integrated feedback (...)
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