TPA3251

ACTIVE

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

Top

Product details

Parameters

Audio input type Analog Input Architecture Class-D Speaker channels (Max) 4 Power stage supply (Max) (V) 36 Power stage supply (Min) (V) 12 Load (Min) (ohms) 1.5 Output power (W) 175 SNR (dB) 111 THD + N @ 1 kHz (%) 0.005 Iq (Typ) (mA) 12.5 Control interface Hardware Closed/open loop Closed Analog supply (Min) (V) 10.8 Analog supply (Max) (V) 13.2 PSRR (dB) 80 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
    • 175-W Stereo into 4 Ω in BTL Configuration
    • 220-W Stereo into 3 Ω in BTL Configuration
    • 350-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1%THD+N
    • 140-W Stereo into 4 Ω in BTL Configuration
    • 175-W Stereo into 3 Ω in BTL Configuration
    • 285-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 0.005% THD+N at 1 W into 4 Ω and
      <0.01% THD+N to Clipping
    • 60 dB PSRR (BTL, No Input Signal)
    • <60 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 12-V to 36-V 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
open-in-new Find other Speaker amps

Description

TPA3251 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 can drive up to 2 x 175 W into 4-Ω load and 2 x 220 W into 3-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, TPA3251 achieves both high power efficiency and very low power stage idle losses below 1 W. This is achieved through the use of 60 mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.

open-in-new Find other Speaker amps
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 14
Type Title Date
* Datasheet TPA3251 175-W Stereo, 350-W Mono PurePath™ Ultra-HD Analog-Input Class-D Amplifier datasheet (Rev. D) Apr. 20, 2016
Application note TPA324x and TPA325x Post-Filter Feedback (Rev. A) Mar. 07, 2018
More literature High-Power Audio Amplifiers TPA322x/4x/5x Dec. 01, 2017
User guide TPA3251 Evaluation Module User's Guide Nov. 02, 2017
Application note Multi-Device Configuration for TPA32xx Amplifiers Sep. 27, 2017
Technical articles Get loud with a 700W automotive audio amplifier for infotainment systems Jun. 15, 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 note Class-D Amplifier External Load Diagnostics Jan. 23, 2017
Application note LC Filter Design (Rev. A) Nov. 09, 2016
Application note TPA32xx Analog Input Grounding for Single Ended Inputs Aug. 26, 2016
More literature High-Power Audio Amplifiers Jul. 14, 2016
Technical articles How to select an audio amplifier for products with internal or external speakers Feb. 29, 2016

Design & development

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

Hardware development

EVALUATION BOARD Download
Guitar SideGig Plug-In Module
SIDEGIG-GUITAREVM
49
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 BOARD Download
49
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 BOARD Download
49
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 BOARD Download
149
Description

The TPA3251EVM Ultra-HD evaluation module demonstrates the TPA3251 integrated circuit from Texas Instruments. The TPA3251 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 and (...)

Features
  • Supports Post-Filter Feedback
  • Self-contained protection system (short circuit, clip and thermal)
  • Standard 2VRMS differential input or single ended line input
  • BTL, PBTL and SE output configurations support
  • Double-sided, plated-through, 2oz. Cu 2 layer PCB layout
  • Supports Audio Plug-In Boards through its (...)

Design tools & simulation

SIMULATION TOOL Download
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 (...)
Features
  • 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
  • (...)
DESIGN TOOL Download
SLAC732A.ZIP (347 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
REFERENCE DESIGNS Download
700-W Automotive External Audio Amplifier Reference Design
PMP11769 — The PMP11769 reference design is a complete solution for a 700W automotive external amp. The boost converter provides 36.0V @ 10.0A continuous / 20.0A peak from an input voltage of 9-16V. It contains two premium Class-D audio amplifiers, which provide 2x 175W @ 4-Ω load (left & right (...)
document-generic Schematic
REFERENCE DESIGNS Download
High Fidelity 175W Class-D Audio Amplifier with Digital Inputs and Processing Reference Design
TIDA-00874 This design turns the extremely high performance analog input TPA3251 Class-D amplifier into a digital input system with audio processing using the highly versatile PCM5242 differential output DAC. Now the full performance of TPA3251 amplifier can be realized with a variety of digital input sources (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (DDV) 44 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos