Design tool
TPA3251
175-W stereo, 350-W mono, 12- to 38-V supply, analog input Class-D Smart Audio Amplifier
Data sheet
TPA3251
- 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
- Signal Bandwidth up to 100 kHz for High
- 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
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.
Technical documentation
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Evaluation board
SIDEGIG-GUITAREVM — Guitar SideGig Plug-In Module
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, (...)
User guide: PDF
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.
Start your prototype on the included breadboard or solder directly to the (...)
Start your prototype on the included breadboard or solder directly to the (...)
User guide: PDF
Evaluation board
SIDEGIG-XOVEREVM — Analog, Active Crossover Audio Plug-in Module
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
Evaluation board
TPA3251EVM — TPA3251 175W Stereo / 350W Mono Ultra-HD, Analog-In Class-D Module
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 (...)
User guide: PDF
Design tool
SLAC736 — TPA3251 Inductor Study
Supported products & hardware
Products
Speaker amps
Software
Design tool
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 (...)
Reference designs
TIDA-00874 — High Fidelity 175-W Class-D Audio Amplifier with Digital Inputs and Processing Reference Design
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 (...)
Reference designs
PMP11769 — 700-W Automotive External Audio Amplifier Reference Design
This reference design contains a boost converter that provides 36.0-V @ 10.0-A continuous / 20.0-A peak from an input voltage of 9 to 16 V. It contains two premium Class-D audio amplifiers which provide 2x 175-W @ 4-Ω load (left and right channel) and 1x 350-W @ 2-Ω (subwoofer). (...)
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (DDV) | 44 | Ultra Librarian |
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