Overview
The TPA3220DDWR from Texas Instruments is a high-efficiency, Class-D audio amplifier designed for a wide range of audio applications. This device is part of the TPA3220 family and is known for its low idle power consumption and high efficiency, making it suitable for systems where power management is critical. The TPA3220 operates with either AD (Analog) or HEAD (High Efficiency AD) modulation, ensuring low distortion across the audio band and delivering excellent sound quality. It features a closed-loop feedback system with a bandwidth up to 100 kHz, which enhances sound quality significantly.
The amplifier can drive up to 2 x 60 W continuously or 2 x 110 W peak into a 4-Ω load, with the thermal pad on the bottom connected to the PCB for efficient heat dissipation. It supports single-ended or differential analog-input interfaces with four selectable gains: 18 dB, 24 dB, 30 dB, and 34 dB.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Power (Continuous) | 2 x 60 W | - |
| Output Power (Peak) | 2 x 110 W | - |
| Load Resistance | 4 Ω, 8 Ω | - |
| Supply Voltage Range | 7 V to 32 V | V |
| Efficiency | >90% | % |
| Idle Power | <0.25 W | W |
| Standby Power | <0.1 W | W |
| MOSFET Resistance (Rds(on)) | 70 mΩ | mΩ |
| Package Type | HTSSOP (44 pins) | - |
| Thermal Resistance (RθJA) | 23.5 °C/W | °C/W |
| Feedback Bandwidth | Up to 100 kHz | kHz |
| Analog Input Interface | Single-ended or differential | - |
| Selectable Gains | 18 dB, 24 dB, 30 dB, 34 dB | dB |
Key Features
- High Efficiency: Achieves >90% efficiency, reducing heat generation and power consumption.
- Low Power Modes: Features low idle power (<0.25 W) and ultra-low standby power (<0.1 W).
- Advanced Modulation: Operates with either AD or low idle-current HEAD (High Efficiency AD) modulation.
- Protection Features: Includes undervoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, as well as DC speaker protection.
- Integrated LDO: Built-in LDO for easy integration in single-power-supply systems.
- Thermal Management: Thermal pad located on the bottom of the package for efficient thermal coupling to the PCB.
- Selectable Gains: Supports four selectable gains: 18 dB, 24 dB, 30 dB, and 34 dB.
Applications
- Bluetooth and Wi-Fi Speakers: Ideal for wireless speaker systems.
- Sound Bars: Enhances audio quality in sound bar applications.
- Subwoofers: Suitable for subwoofer systems requiring high power output.
- Bookshelf Stereo Systems: Used in home audio systems for improved sound quality.
- Professional and Public Address (PA) Speakers: Applicable in professional audio equipment and public address systems.
Q & A
- What is the maximum continuous output power of the TPA3220DDWR?
The TPA3220DDWR can deliver up to 2 x 60 W continuously into an 8-Ω load in BTL configuration.
- What is the peak output power of the TPA3220DDWR?
The device can deliver up to 2 x 110 W peak into a 4-Ω load.
- What is the supply voltage range for the TPA3220DDWR?
The supply voltage range is from 7 V to 32 V.
- What is the efficiency of the TPA3220DDWR?
The device achieves an efficiency of >90%.
- What are the selectable gains of the TPA3220DDWR?
The device supports four selectable gains: 18 dB, 24 dB, 30 dB, and 34 dB.
- What protection features are integrated into the TPA3220DDWR?
The device includes undervoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, as well as DC speaker protection.
- How does the TPA3220DDWR manage thermal issues?
The device has a thermal pad located on the bottom of the package for efficient thermal coupling to the PCB.
- What is the package type of the TPA3220DDWR?
The device is available in a 44-pin HTSSOP package.
- What are the typical applications of the TPA3220DDWR?
It is used in Bluetooth and Wi-Fi speakers, sound bars, subwoofers, bookshelf stereo systems, and professional and public address (PA) speakers.
- Does the TPA3220DDWR have an integrated LDO?
Yes, the device includes a built-in LDO for easy integration in single-power-supply systems.
