1 Features
1• 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 Highspeed
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

2 Applications
• Blu-ray Disk™ / DVD Receivers
• High End HTiB Systems
• AV Receivers
• High End Soundbar
• Mini Combo Systems
• Active Speakers and Subwoofers

3 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 highspeed
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.