Overview
The TPA3255DDVR, produced by 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. This technology enables ultra-low distortion across the audio band, resulting in superior audio quality. The device operates in AD-mode and can drive up to 2 x 315 W into a 4-Ω load at 10% THD and 2 x 150 W unclipped into an 8-Ω load. It also includes a 2 VRMS analog input interface that works seamlessly with high-performance DACs such as TI's PCM5242.
Key Specifications
| Parameter | Value |
|---|---|
| Package | HTSSOP (DDV) with 44 pins |
| Operating Temperature Range | 0 to 70°C |
| Supply Voltage Range | 18 to 53.5 V |
| Total Output Power at 10% THD+N | 315 W Stereo into 4 Ω in BTL Configuration 185 W Stereo into 8 Ω in BTL Configuration 600 W Mono into 2 Ω in PBTL Configuration |
| Total Output Power at 1% THD+N | 260 W Stereo into 4 Ω in BTL Configuration 150 W Stereo into 8 Ω in BTL Configuration 480 W Mono into 2 Ω in PBTL Configuration |
| THD+N | 0.006% at 1 W into 4 Ω and <0.01% to Clipping |
| PSRR | >65 dB (BTL, 1 kHz, No Input Signal) |
| Output Noise | <85 µV (A-Weighted) |
| SNR | >111 dB (A Weighted) |
| Signal Bandwidth | Up to 100 kHz for High Frequency Content From HD Sources |
| Efficiency | 90% Efficient Class-D Operation (4 Ω) |
| Protection Features | Undervoltage, Overtemperature, Clipping, and Short Circuit Protection with Error Reporting |
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
- Wide 18-V to 53.5V 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
- Ultra Low Distortion and High Signal Bandwidth up to 100 kHz
- High Power Efficiency and Very Low Power Stage Idle Losses Below 2.5W
Applications
- Active Speakers
- Subwoofers
- Home Theater Systems
- Professional Audio Equipment
- Automotive Audio Systems
Q & A
- What is the maximum output power of the TPA3255 in stereo configuration?
The TPA3255 can deliver up to 315 W per channel into a 4-Ω load at 10% THD+N in stereo configuration.
- What is the PurePath™ Ultra-HD technology in the TPA3255?
PurePath™ Ultra-HD is an advanced integrated feedback design with high-speed gate driver error correction, enabling ultra-low distortion across the audio band and superior audio quality.
- What are the possible output configurations for the TPA3255?
The TPA3255 supports multiple configurations including stereo, mono, 2.1, and 4xSE.
- What is the supply voltage range for the TPA3255?
The supply voltage range for the TPA3255 is from 18 to 53.5 V.
- Does the TPA3255 have built-in protection features?
Yes, the TPA3255 includes self-protection features such as undervoltage, overtemperature, clipping, and short circuit protection with error reporting.
- What is the efficiency of the TPA3255 in class-D operation?
The TPA3255 achieves 90% efficient class-D operation into a 4-Ω load.
- How does the TPA3255 minimize idle losses?
The TPA3255 uses 85 mΩ MOSFETs and an optimized gate driver scheme to achieve significantly lower idle losses below 2.5 W.
- Is the TPA3255 EMI compliant?
Yes, the TPA3255 is EMI compliant when used with recommended system design.
- What is the signal bandwidth of the TPA3255?
The signal bandwidth of the TPA3255 is up to 100 kHz for high frequency content from HD sources.
- Does the TPA3255 support click and pop free startup and stop?
Yes, the TPA3255 features click and pop free startup and stop.
