The TDA7297 Power Amplifier Board (A-Type) provides a robust and reliable solution for stereo audio amplification needs. Utilizing the STMicroelectronics TDA7297 monolithic integrated circuit, this finished board delivers true dual-channel (stereo) output, providing up to 15 watts per channel of clean, high-fidelity audio power. The module is specifically designed for ease of use, operating from a single 9V to 15V DC power supply, with a nominal and optimal input voltage of 12V.
This “A-Type” board is distinguished by its compact design and all necessary components pre-assembled, making it a “finished board” ready for immediate integration into your projects. It is engineered with low noise and excellent thermal stability in mind. The board features an onboard potentiometer for volume control, ensuring a user-friendly experience right out of the box. Its high-efficiency Class AB design, combined with integrated short-circuit and thermal protection, ensures durable and safe operation for a wide range of applications, from custom speaker systems to retrofitting existing audio equipment.
Features
Dual-Channel Stereo Output: Provides true stereo sound with two independent channels of amplification.
High Power Output: Delivers up to 15W + 15W of audio power into an 8Ω load.
Wide Operating Voltage: Operates reliably with a single 9V to 15V DC power supply; optimal at 12V.
High-Fidelity Sound: Utilizes the TDA7297 IC known for its high-quality, low-noise audio output.
Integrated Volume Control: Features an onboard single-gang potentiometer for convenient master volume adjustment.
Ready-to-Use (Finished Board): All components are pre-assembled and tested, suitable for immediate project integration.
Robust Protection Systems: Includes integrated short-circuit, thermal overload, and reverse polarity protection for durability and safety.
Compact Design: Small footprint for easy integration into various enclosures and tight spaces.
Usage
The TDA7297 Power Amplifier Board is incredibly straightforward to use, making it ideal for beginners and professionals alike.
Wiring Instructions
Power Supply: Connect a 9V to 15V DC power source to the designated power input terminals (often a DC barrel jack or screw terminals). Ensure correct polarity (positive and ground). A 12V, 2A or higher power supply is recommended for full performance.
Audio Input: Connect your stereo audio source (e.g., phone, PC, MP3 player, TV audio out) to the audio input interface (often a 3.5mm jack or 3-pin header).
Speaker Output: Connect your left and right speakers (4Ω to 8Ω impedance) to the respective speaker output terminals.
Volume Adjustment: Use the onboard potentiometer to control the master volume level.
Application Scenarios
Custom DIY Speaker Systems: Building desktop speakers, workshop audio systems, or upgrading basic passive speakers.
Retrofitting Audio Equipment: Revitalizing old radio consoles or vintage audio players with modern amplification.
Arcade Cabinets: Providing sound amplification for custom arcade machines or entertainment units.
Educational Projects: Used in electronics workshops and classes to demonstrate audio amplification principles.
The TDA7297 IC uses Class AB amplification, which is an analog design known for great sound quality. The module handles digital audio sources by connecting to their analog outputs
Q: Do I need to add a heatsink to the TDA7297 chip?
The board comes as a “finished board,” which means it should already have a heatsink attached to the main IC. It is crucial to ensure this heatsink has good contact and adequate airflow, especially when operating at higher volumes or for extended periods
Q: What kind of power supply should I use?
A stable 12V DC power supply is optimal. A current rating of 2 Amps or more is recommended to ensure sufficient power for both channels at high volume without distortion. Avoid using unregulated power supplies that might exceed the 15V maximum limit.
Q: Can I bridge the two channels to make a single, more powerful mono amplifier?
This board is designed specifically for stereo operation with separate left and right channels. Bridging the TDA7297 IC is a complex modification that requires specific circuit changes and is not recommended for this finished board. If you need mono output, simply use one channel or look for a dedicated mono amplifier module.
Q: I hear static or humming noise. What could be wrong?
Noise is often related to the power supply or improper grounding of the audio input source. Try using a high-quality, regulated 12V power adapter. Ensure all ground connections are secure and consider using shielded audio input cables to minimize interference.
