Texas Instruments TPA3251

Description

This user's guide describes the characteristics, operation, and use of the TPA3251 evaluation module(EVM).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.

Features

• Differential Analog Inputs
• Total Output Power at 10%THD+N175-W Stereo into 4 Ω in BTL Configuration220-W Stereo into 3 Ω in BTL Configuration350-W Mono into 2 Ω in PBTL Configuration
• Total Output Power at 1%THD+N140-W Stereo into 4 Ω in BTL Configuration175-W Stereo into 3 Ω in BTL Configuration285-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 HighFrequency Content From HD SourcesUltra Low 0.005% THD+N at 1 W into 4 Ω and <0.01% THD+N to Clipping60 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

More information

• Datasheet
• IC product information