Texas Instruments TPA3245 PurePath Ultra-HD Class-D Amplifier
Texas Instruments TPA3245 PurePath™ Ultra-HD Class-D Amplifier is a high-performance class-D power amplifier that enables true premium sound quality with class-D efficiency. The TPA3245 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 provides superior audio quality. The device is operated in AD-mode and can drive up to 2×115W into a 4Ω load and 2×145W into a 3Ω load. The TPS3245 also features a 2VRMS analog input interface that works seamlessly with high-performance DACs such as TI’s PCM5242. In addition to excellent audio performance, the TPA3245 achieves high power efficiency and low power stage idle losses below 0.45W. This feature is achieved through the use of 65mΩ MOSFETs and an optimized gate driver scheme. This driver scheme can achieve significantly lower idle losses than typical discrete implementations.
Features
- Differential analog inputs
- Total output power at 10%THD+N
- 115W stereo into 4Ω in BTL configuration
- 145W stereo into 3Ω in BTL configuration
- 230W mono into 2Ω in PBTL configuration
- Total output power at 1%THD+N
- 95W stereo into 4Ω in BTL configuration
- 115W stereo into 3Ω in BTL configuration
- 185W mono into 2Ω in PBTL configuration
- Advanced integrated feedback design with high-speed gate driver error correction (PurePath™ Ultra-HD)
- Signal bandwidth up to 100kHz for high-frequency content From HD sources
- Ultra-low 0.005% THD+N at 1W into 4Ω and <0.01% THD+N to clipping
- 65dB PSRR (BTL, no input signal)
- <50µV (A-weighted) output noise
- >112dB (A-weighted) SNR
- Multiple configurations possible
- Stereo, mono, 2.1 and 4xSE
- Click and pop free startup and stop
- 90% efficient Class-D operation (4Ω)
- Wide 12V to 30V 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
Applications
- Blu-Ray Disc™ / DVD receivers
- High-end TV sets
- High-end soundbar
- Mini combo systems
- Active speakers and subwoofers
Simplified Schematic
Related Development Tools
Texas Instruments TPA3245EVM PurePath™ Ultra-HD Evaluation Module
Demonstrates the features of the TPA3245DDW, an analog-in, Class-D amplifier.
Texas Instruments SIDEGIG-XOVEREVM Crossover Audio Plug-in Module
Turns TI Audio Class-D amplifier evaluation modules into a high quality, two-way speaker amplifier.
Published: 2017-05-10
| Updated: 2023-06-01