Overview
The TAS3251DKQR from Texas Instruments is a digital-input, high-performance Class-D audio amplifier designed to deliver premium sound quality with the efficiency of Class-D operation. This amplifier features a high-performance Burr-Brown™ DAC with integrated DSP for advanced audio processing, including SmartAmp and SmartEQ. It is the first high-power single-chip solution, reducing overall system size and cost. The DSP is supported by TI PurePath™ Console Graphical tuning software for easy speaker tuning and control. The Class-D power stage includes advanced integrated feedback and proprietary high-speed gate drive error correction, ensuring ultra-low distortion and noise across the audio band.
Key Specifications
| Specification | Value |
|---|---|
| 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 |
| THD+N | Ultra Low 0.01% at 1 W Into 4 Ω, <0.01% to Clipping |
| PSRR (BTL, No Input Signal) | 60 dB |
| Output Noise (A-Weighted) | <95 µV |
| SNR (A-Weighted) | >108 dB |
| Supply Voltage Operation | 12 V to 36 V |
| Efficiency | 90% Efficient Class-D Operation (4 Ω) |
| Audio Input Formats | I2S, TDM, Left-Justified, Right-Justified; 32 kHz, 44.1 kHz, 48 kHz, 96 kHz; Supports 3-Wire Digital Input (No MCLK) |
| Control Interface | I2C Software Mode Control, Address Select Pin |
| Protection Features | Undervoltage, Cycle-by-cycle Current Limit, Short Circuit, Clipping detection, Overtemperature Warning and Shutdown, DC Speaker Protection |
Key Features
- Advanced Integrated Closed-Loop Design: Ensures ultra-low distortion and noise across the audio band.
- Fixed-Function Processing Features: Includes SmartEQ (up to 15x BiQuads per channel), Crossover EQ (2x 5 BiQuads), 3-Band Advanced DRC + AGL, Dynamic EQ, and SmartBass.
- Sample Rate Conversion: Supports various sample rates for flexible audio processing.
- Integrated DSP with Burr-Brown™ DAC: Provides advanced audio processing capabilities.
- TI PurePath™ Console Support: Graphical tuning software for quick and easy speaker tuning and control.
- Wide Supply Voltage Operation: Operates from 12 V to 36 V.
- Integrated Protection: Includes undervoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, and DC speaker protection.
Applications
- Bluetooth and WiFi Speakers
- Soundbars
- Subwoofers
- Bookshelf Stereo Systems
- Professional and Public Address (PA) Speakers
- Active Crossover and Two-Way Speakers
Q & A
- What is the maximum output power of the TAS3251DKQR in BTL configuration?
The TAS3251DKQR can deliver up to 175 W into 4 Ω and 220 W into 3 Ω in BTL configuration at 10% THD+N.
- What are the supported audio input formats for the TAS3251DKQR?
The TAS3251DKQR supports I2S, TDM, Left-Justified, and Right-Justified audio input formats at sample rates of 32 kHz, 44.1 kHz, 48 kHz, and 96 kHz.
- What is the efficiency of the TAS3251DKQR in Class-D operation?
The TAS3251DKQR operates with 90% efficiency in Class-D mode at 4 Ω.
- What kind of integrated protection does the TAS3251DKQR offer?
The TAS3251DKQR includes protection features such as undervoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, and DC speaker protection.
- What is the purpose of the TI PurePath™ Console in relation to the TAS3251DKQR?
The TI PurePath™ Console is a graphical tuning software that supports the TAS3251DKQR for quick and easy speaker tuning and control.
- What are the key audio processing features of the TAS3251DKQR?
The TAS3251DKQR includes advanced audio processing features such as SmartEQ, Crossover EQ, 3-Band Advanced DRC + AGL, Dynamic EQ, and SmartBass.
- What is the typical SNR and output noise of the TAS3251DKQR?
The TAS3251DKQR has a Signal-to-Noise Ratio (SNR) of >108 dB and an output noise of <95 µV (A-Weighted).
- What is the operating supply voltage range for the TAS3251DKQR?
The TAS3251DKQR operates from a supply voltage of 12 V to 36 V.
- How does the TAS3251DKQR manage thermal issues?
The TAS3251DKQR includes overtemperature warning and shutdown features to manage thermal issues.
- What is the package type and pin count of the TAS3251DKQR?
The TAS3251DKQR comes in a 56-pin HSSOP package.
