TPA3255

ACTIVE

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

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Product details

Parameters

Audio input type Analog Input Architecture Class-D Speaker channels (Max) 4 Power stage supply (Max) (V) 53.5 Power stage supply (Min) (V) 18 Load (Min) (ohms) 2 Output power (W) 315 SNR (dB) 112 THD + N @ 1 kHz (%) 0.006 Iq (Typ) (mA) 34 Control interface Hardware Closed/open loop Closed Analog supply (Min) (V) 10.8 Analog supply (Max) (V) 13.2 Power to parallel bridge tied load (Max) (W) 600 PSRR (dB) 80 Rating Catalog Operating temperature range (C) 0 to 70 open-in-new Find other Speaker amps

Package | Pins | Size

HTSSOP (DDV) 44 113 mm² 14 x 8.1 open-in-new Find other Speaker amps

Features

  • 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

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Description

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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No results found. Please clear your search and try again. View all 13
Type Title Date
* Datasheet TPA3255 315-W Stereo, 600-W Mono PurePath™ Ultra-HD Analog-Input datasheet (Rev. A) Oct. 04, 2016
Application notes TPA324x and TPA325x Post-Filter Feedback (Rev. A) Mar. 07, 2018
More literature High-Power Audio Amplifiers TPA322x/4x/5x Dec. 01, 2017
Application notes Multi-Device Configuration for TPA32xx Amplifiers Sep. 27, 2017
Technical articles Professional audio equipment made the most noise at the 2017 NAMM Show Mar. 14, 2017
More literature TI Automotive External Amplifiers (Rev. A) Feb. 03, 2017
More literature TI Powered Speakers (Rev. A) Jan. 31, 2017
Application notes Class-D Amplifier External Load Diagnostics Jan. 23, 2017
Application notes LC Filter Design (Rev. A) Nov. 09, 2016
Application notes TPA32xx Analog Input Grounding for Single Ended Inputs Aug. 26, 2016
User guides TPA3255EVM User's Guide Jul. 15, 2016
More literature High-Power Audio Amplifiers Jul. 14, 2016
Technical articles How Class-D amplifiers are closing the gap on hi-res Class-AB amplifiers Apr. 01, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
Guitar SideGig Plug-In Module
SIDEGIG-GUITAREVM
document-generic User guide
$49.00
Description

The TI Guitar SideGig plug-in module turns TI Audio Class-D amplifier EVM’s into a guitar, bass or musical instrument amplifier. The board features selectable “clean” and “drive” channels for traditional and overdriven guitar sounds. The clean channel offers volume (...)

Features
  • Connects to TI Class-D Amplifier EVMs with the Audio Interface Board (AIB) connector
  • Drive channel adds drive, tone and level controls
  • Clean Channel with treble, middle, bass and volume controls
  • Supports one BTL channel or PBTL Class-D amplifier output
  • Input: ¼” mono input jack for musical instruments
  • (...)
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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.

Start your prototype on the included breadboard or solder directly to the PCB (...)
Features
  • Compatible with TI Audio Plug-in Module Ecosystem
  • Prototype using either the included breadboard or perf-board dot pattern
  • Class-D Input and Outputs provided on a 100 mil header
  • Connect to TI Class-D Audio EVMs (Check compatibility)
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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 (...)
Features
  • Compatible with TI Audio Plug-in Module Ecosystem
  • Complete design for two-way, active crossover speakers
  • Active crossover includes a high-pass filter, low-pass filter, baffle step and delay
  • Input: Mono RCA jack
  • Output: Analog, 2-channel, 2-Vrms differential
  • Connect to TI Class-D Audio EVMs (Check (...)
EVALUATION BOARDS Download
document-generic User guide
$149.00
Description
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 design (...)
Features
  • Stereo Ultra-HD evaluation module
  • Self-contained protection system (short circuit, clip and thermal)
  • Standard 2 VRMS differential input  or single ended line input
  • BTL, PBTL and SE output configurations support
  • Double-sided, plated-through, 2oz. Cu 2 layer PCB layout

Design tools & simulation

CIRCUIT DESIGNS Download
Class-D LC Filter Designer
LCFILTER-CALC-TOOL — 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 response.  (...)
Features
  • Calculate LC filter inductor and capacitor values quickly
  • Select from 4 different Class-D filter types
  • Tune frequency response with corner frequency and quality factor (Q) inputs
  • Verify and graph filter response with multiple speaker loads
BILL OF MATERIALS (BOM) Download
SLAR130A.PDF (29 KB)
PCB LAYOUTS Download
SLAR131A.PDF (953 KB)
SCHEMATICS Download
SLAR129A.PDF (440 KB)

Reference designs

REFERENCE DESIGNS Download
Universal Input to 3.3V, 12V, 36V, 200W Continuous PSU for Class-D Amplifier Reference Design
PMP10215 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HTSSOP (DDV) 44 View options

Ordering & quality

Support & training

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