Overview
The TPA3221DDVR from Texas Instruments is a high-power Class-D audio amplifier designed for efficient operation across full-power, idle, and standby modes. This device supports both stereo and mono configurations, making it versatile for various audio applications. It features a wide supply voltage range of 7 to 32 volts and can deliver up to 100 watts in stereo mode and 200 watts in mono mode. The TPA3221 is known for its high efficiency, achieving over 90% efficiency, and its low idle and standby power consumption, which helps in reducing heat and extending battery life in portable systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 7 to 32 | V |
| Output Power (Stereo, 10% THD+N) | 105 W (4 Ω), 112 W (3 Ω) | W |
| Output Power (Mono, 10% THD+N) | 208 W (2 Ω) | W |
| Output Power (Stereo, 1% THD+N) | 88 W (4 Ω), 100 W (3 Ω) | W |
| Output Power (Mono, 1% THD+N) | 170 W (2 Ω) | W |
| Signal Bandwidth | Up to 100 kHz | kHz |
| Efficiency | >90% (4 Ω) | % |
| Idle Power | <0.25 W | W |
| Standby Power | <0.1 W | W |
| Analog Input Interface | Single-ended or differential, up to 2 V RMS | V RMS |
| Selectable Gains | 18 dB, 24 dB, 30 dB, 34 dB | dB |
| Protection Features | Undervoltage, overvoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, DC speaker protection | |
| Package | HTSSOP (44 pins) |
Key Features
- Closed-loop feedback design with a bandwidth up to 100 kHz for high-frequency content from HD sources.
- Supports both stereo (2 x BTL) and mono (1 x PBTL) operation.
- Single-ended or differential analog-input interface with four selectable gains: 18 dB, 24 dB, 30 dB, and 34 dB.
- Built-in LDO for easy integration in single-power-supply systems.
- Integrated protection features including undervoltage, overvoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, and DC speaker protection.
- High efficiency (>90%) and low idle power (<0.25 W) and ultra-low standby power (<0.1 W).
- Operates with either AD or low idle-current HEAD (High Efficient AD mode) modulation.
Applications
- Wireless and powered speakers.
- Soundbars.
- Subwoofers.
- Bookshelf stereo systems.
- Professional and public address (PA) speakers.
Q & A
- What is the supply voltage range of the TPA3221?
The supply voltage range of the TPA3221 is 7 to 32 volts.
- What are the output power capabilities of the TPA3221 in stereo mode?
The TPA3221 can deliver up to 105 watts into 4 Ω and 112 watts into 3 Ω in stereo mode at 10% THD+N.
- What are the output power capabilities of the TPA3221 in mono mode?
The TPA3221 can deliver up to 208 watts into 2 Ω in mono mode at 10% THD+N.
- What is the efficiency of the TPA3221?
The TPA3221 achieves over 90% efficiency.
- What types of analog input interfaces does the TPA3221 support?
The TPA3221 supports both single-ended and differential analog-input interfaces.
- What are the selectable gains available on the TPA3221?
The TPA3221 offers four selectable gains: 18 dB, 24 dB, 30 dB, and 34 dB.
- What protection features are integrated into the TPA3221?
The TPA3221 includes undervoltage, overvoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, and DC speaker protection.
- How does the TPA3221 manage power consumption in idle and standby modes?
The TPA3221 features low idle power (<0.25 W) and ultra-low standby power (<0.1 W), making it energy-efficient.
- What is the package type of the TPA3221?
The TPA3221 is available in an HTSSOP (44 pins) package.
- What are some common applications for the TPA3221?
The TPA3221 is commonly used in wireless and powered speakers, soundbars, subwoofers, bookshelf stereo systems, and professional and public address (PA) speakers.
