Overview
The TPA3245DDVR from Texas Instruments is a high-performance class-D power amplifier designed to deliver premium sound quality with the efficiency of class-D operation. This amplifier features an advanced integrated feedback design and proprietary high-speed gate driver error correction known as PurePath™ Ultra-HD, which ensures ultra-low distortion across the audio band and superior audio quality. It operates in AD-mode and can drive up to 2 x 115 W into 4-Ω loads and 2 x 145 W into 3-Ω loads. The device is compatible with high-performance DACs like TI's PCM5242 and offers high power efficiency along with very low power stage idle losses below 0.45 W.
Key Specifications
| Parameter | Value |
|---|---|
| Total Output Power at 10% THD+N | 115 W Stereo into 4 Ω in BTL Configuration, 145 W Stereo into 3 Ω in BTL Configuration, 230 W Mono into 2 Ω in PBTL Configuration |
| Total Output Power at 1% THD+N | 95 W Stereo into 4 Ω in BTL Configuration, 115 W Stereo into 3 Ω in BTL Configuration, 185 W Mono into 2 Ω in PBTL Configuration |
| Supply Voltage Range | 12 V to 31.5 V |
| Signal Bandwidth | Up to 100 kHz for high frequency content from HD sources |
| THD+N | 0.005% at 1 W into 4 Ω and <0.01% to clipping |
| PSRR (BTL, No Input Signal) | 65 dB |
| Output Noise (A-Weighted) | <50 µV |
| SNR (A-Weighted) | >112 dB |
| Efficiency (Class-D Operation at 4 Ω) | 90% |
| Package Type | HTSSOP (44 pins) |
| Operating Temperature Range | 0°C to 70°C |
Key Features
- Differential Analog Inputs
- Advanced Integrated Feedback Design with High-speed Gate Driver Error Correction (PurePath™ Ultra-HD)
- Multiple Configurations Possible: Stereo, Mono, 2.1, and 4xSE
- Click and Pop Free Startup and Stop
- Self-Protection Design (Including Undervoltage, Overtemperature, Clipping, and Short Circuit Protection) With Error Reporting
- EMI Compliant When Used With Recommended System Design
- Wide 12-V to 30-V Supply Voltage Operation
Applications
- Blu-Ray Disc™/ DVD Receivers
- High End TV sets
- High End Soundbar
- Mini Combo Systems
- Active Speakers and Subwoofers
Q & A
- What is the maximum output power of the TPA3245 in stereo configuration?
The TPA3245 can deliver up to 115 W into 4 Ω and 145 W into 3 Ω in stereo configuration at 10% THD+N.
- What is the PurePath™ Ultra-HD technology in the TPA3245?
PurePath™ Ultra-HD is an advanced integrated feedback design with high-speed gate driver error correction, which ensures ultra-low distortion across the audio band and superior audio quality.
- What is the signal bandwidth of the TPA3245?
The signal bandwidth of the TPA3245 is up to 100 kHz for high frequency content from HD sources.
- What is the efficiency of the TPA3245 in class-D operation?
The TPA3245 achieves 90% efficiency in class-D operation at 4 Ω.
- What are the protection features of the TPA3245?
The TPA3245 includes self-protection features such as undervoltage, overtemperature, clipping, and short circuit protection with error reporting.
- What is the package type and pin count of the TPA3245?
The TPA3245 is available in a thermally enhanced HTSSOP package with 44 pins.
- What is the operating temperature range of the TPA3245?
The operating temperature range of the TPA3245 is 0°C to 70°C.
- Is the TPA3245 EMI compliant?
Yes, the TPA3245 is EMI compliant when used with the recommended system design.
- What are the typical applications of the TPA3245?
The TPA3245 is typically used in applications such as Blu-Ray Disc™/ DVD Receivers, High End TV sets, High End Soundbar, Mini Combo Systems, and Active Speakers and Subwoofers.
- How does the TPA3245 achieve low power stage idle losses?
The TPA3245 achieves low power stage idle losses through the use of 65 mΩ MOSFETs and an optimized gate driver scheme, resulting in idle losses below 0.45 W.
