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TPA3255

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315-W stereo, 600-W mono, 18- to 53.5-V supply, analog input Class-D audio amplifier

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Data sheet

TPA3255

ACTIVE
Data sheet Order now

Product details

Audio input type Analog Input Architecture Class-D Speaker channels (max) 4 Control interface Hardware Output power (W) 315 Power stage supply (max) (V) 53.5 Power stage supply (min) (V) 18 THD + N at 1 kHz (%) 0.006 Load (min) (Ω) 2 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 Analog Input Architecture Class-D Speaker channels (max) 4 Control interface Hardware Output power (W) 315 Power stage supply (max) (V) 53.5 Power stage supply (min) (V) 18 THD + N at 1 kHz (%) 0.006 Load (min) (Ω) 2 Analog supply voltage (min) (V) 10.8 Analog supply voltage (max) (V) 13.2 Rating Catalog Operating temperature range (°C) 0 to 70
HTSSOP (DDV) 44 113.4 mm² 14 x 8.1
  • Differential Analog Inputs
  • Total Output Power at 10%THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 185-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1%THD+N
    • 260-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 480-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    (PurePath™ Ultra-HD)
    • 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
  • EMI Compliant When Used With Recommended System Design
  • Differential Analog Inputs
  • Total Output Power at 10%THD+N
    • 315-W Stereo into 4 Ω in BTL Configuration
    • 185-W Stereo into 8 Ω in BTL Configuration
    • 600-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1%THD+N
    • 260-W Stereo into 4 Ω in BTL Configuration
    • 150-W Stereo into 8 Ω in BTL Configuration
    • 480-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction
    (PurePath™ Ultra-HD)
    • 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
  • EMI Compliant When Used With Recommended System Design

TPA3255 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 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 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 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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Technical documentation

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Type Title Date
* Data sheet TPA3255 315-W Stereo, 600-W Mono PurePath™ Ultra-HD Analog-Input datasheet (Rev. A) PDF | HTML 04 Oct 2016
Application note Class-D Amplifier External Load Diagnostics (Rev. A) PDF | HTML 17 Jul 2025
Application note Power Amplifiers for Constant Voltage Audio Systems PDF | HTML 06 Sep 2022
Application note TPA324x and TPA325x Post-Filter Feedback (Rev. A) 07 Mar 2018
More literature High-Power Audio Amplifiers TPA322x/4x/5x 01 Dec 2017
Application note Multi-Device Configuration for TPA32xx Amplifiers 27 Sep 2017
Technical article Professional audio equipment made the most noise at the 2017 NAMM Show PDF | HTML 14 Mar 2017
More literature TI Automotive External Amplifiers (Rev. A) 03 Feb 2017
More literature TI Powered Speakers (Rev. A) 31 Jan 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
More literature High-Power Audio Amplifiers 14 Jul 2016
Technical article How Class-D amplifiers are closing the gap on hi-res Class-AB amplifiers PDF | HTML 01 Apr 2016

Design & development

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Evaluation board

SIDEGIG-PROTOEVM — Prototype Audio Plug-in Module

The TI Prototype Audio Plug-in Module turns TI Audio Class-D amplifier EVM’s into your sandbox. Need to prototype a pre-amplifier circuit or test an opamp with TI Class-D EVMs, then start with the DIY Audio Plug-in Module.

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Evaluation board

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The TI Analog, Active Crossover Audio Plug-in Module turns TI Audio Class-D amplifier EVM’s into a high quality, two-way speaker amplifier.  The plug-in module makes it easy to remove the large and expensive passive crossover found in passive loudspeakers and create a biamped, two-way (...)
User guide: PDF
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Code example or demo

SLAC733 — TPA3255 Setup Guide & Configuration Tool

Supported products & hardware

Supported products & hardware

Products
General-purpose audio amplifiers
  • TPA3255 — 315-W stereo, 600-W mono, 18- to 53.5-V supply, analog input Class-D audio amplifier
Hardware development
Evaluation board
  • TPA3255EVM — TPA3255 315W Stereo / 600W Mono Ultra-HD Analog-In Audio Class-D Module
Download
Bill of materials (BOM)

TPA3255EVM BOM (Rev. A)

SLAR130A.PDF (29 KB)
Download
Calculation tool

LCFILTER-CALC-TOOL — Class-D LC Filter Designer

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 (...)
Supported products & hardware

Supported products & hardware

Products
General-purpose audio amplifiers
  • TPA3255 — 315-W stereo, 600-W mono, 18- to 53.5-V supply, analog input Class-D audio amplifier
Speaker, TV & soundbar audio amplifiers
  • TAS3251 — 175-W stereo, 350-W mono, 12- to 38-V supply, digital input Class-D Smart Audio Amplifier
Hardware development
Evaluation board
  • TAS5634EVM — TAS5634 300W Stereo/600W Mono HD Digital Input, 58V Class-D Amplifier Power Stage Evaluation Module
  • TPA3221EVM — TPA3221 100W Stereo/ 200W Mono HD Analog-In Class-D Amplifier Evaluation Module
  • TPA3244EVM — TPA3244 60W Stereo / 110W Peak Ultra-HD Analog-In Audio Class-D Pad-Down Module
  • TPA3245EVM — TPA3245 115W Stereo / 230W Mono Ultra-HD Analog-In Audio Class-D Module
  • TPA3250D2EVM — TPA3250 70W Stereo / 130W Peak Ultra-HD Analog-In Audio Class-D Pad-Down Module
  • TPA3251EVM — TPA3251 175W Stereo / 350W Mono Ultra-HD, Analog-In Class-D Module
  • TPA3255EVM — TPA3255 315W Stereo / 600W Mono Ultra-HD Analog-In Audio Class-D Module
Software
Design tool
Download
PCB layout

TPA3255EVM PCB (Rev. A)

SLAR131A.PDF (953 KB)
Download
Schematic

TPA3255EVM Schematic (Rev. A)

SLAR129A.PDF (440 KB)
Download
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Reference designs

PMP10215 — Universal Input to 3.3V, 12V, 36V, 200W Continuous PSU for Class-D Amplifier Reference Design

This power module generates all voltages to supply a class-D audio amplifier. The main output voltage is 36V and delivers 200W continuously and 840W peak. The first stage is a power-factor corrected Boost. A Flyback converter supplies 12V on primary side as well as 12V@300mA and 3.3V@200mA on (...)
Test report: PDF
Schematic: PDF
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HTSSOP (DDV) 44 Ultra Librarian
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