A Review of TDA2009A Dual Audio Power Amplifier
17 October 2023
Ⅱ. Symbol, footprint and pin configuration of TDA2009A
Ⅲ. Technical parameters of TDA2009A
Ⅳ. What are the features of TDA2009A?
Ⅴ. How does the overheating protection circuit of TDA2009A work?
Ⅵ. Dimensions and package of TDA2009A
Ⅶ. What are the applications of TDA2009A?
Ⅷ. Precautions for using TDA2009A
TDA2009A is a dual-channel audio power amplifier manufactured by STMicroelectronics. It contains two identical amplifiers and each channel can reach 10W power. This high-fidelity power amplifier integrated block has been widely used in audio systems due to its reasonable price, excellent performance and easy installation. It has an overheat protection circuit to ensure that the equipment will not be damaged under overheating conditions. At the same time, it has few external components and is simple to install, which can greatly simplify the design of the audio system. The TDA2009A has a current of 3.5 A, operates within a voltage range of 8V to 28V, and can handle a power dissipation of 20,000 mW, making it suitable for amplifying audio in a variety of scenarios.
Replacement and equivalent:
• NTE7105
• TDA2009
• TDA2030
TDA2009A is an audio power amplifier integrated circuit in Multiwatt package. It has 11 pins, which provide interfaces for power supply, input, output, protection and other functions. Below are its pin names and descriptions.
Pin 1 (NON-INV-INPUT 1): Non-Inverting Input 1
Pin 2 (INV-INPUT 1): Inverting Input 1
Pin 3 (SVRR): Supply Voltage Rejection Ratio
Pin 4 (INV-INPUT 2): Inverting Input 2
Pin 5 (NON-INV-INPUT 2): Non-Inverting Input 2
Pin 6 (GND): Ground
Pin 7 (NC): No Connection
Pin 8 (OUTPUT 2): Output 2
Pin 9 (+VCC): Positive Power Voltage
Pin 10 (OUTPUT 1): Output 1
Pin 11 (NC): No Connection
• Clear sound quality: Its sound quality is clear and there is no noise interference.
• Few external components: Its design makes the installation process relatively simple and requires fewer external components.
• Has overheating protection circuit: The overheating protection circuit ensures that the device will not be damaged when it overheats.
• High output power: TDA2009A usually provides about 10 watts of output power.
• Low output impedance: Its output impedance is relatively low, which helps drive speakers and reduce power loss.
• High-quality audio: TDA2009A generally provides lower harmonic distortion and good signal-to-noise ratio to ensure high-quality audio output.
• Dual-channel (stereo) output: The TDA2009A is an audio processing chip with two independent amplification channels, which makes it ideal for stereo audio applications. By amplifying the audio signals of the left and right channels simultaneously, it provides clearer and more balanced sound quality.
The first is overheat detection. There is a thermistor in this circuit that senses the temperature of the amplifier chip. When the chip temperature is too high, the resistance of the thermistor will change, thereby changing the voltage or current of the circuit connected in series with it. This change is passed to the circuit controller and triggers corresponding protective measures.
The second is protective action. When the thermistor detects overheating, a circuit in series with it sends a signal to the overheat protection circuit. After receiving the signal, the overheat protection circuit will take corresponding protective measures, such as cutting off the power input of the amplifier chip or reducing its operating current.
The TDA2009A is 19.6 mm long, 5 mm wide, and 10.7 mm high.
The TDA2009A utilizes the Multiwatt package, offering exceptional convenience. Its compact dimensions not only bolster its robustness but also render it well-suited for an array of electronic applications. The Multiwatt package serves the purpose of ensuring robust protection, efficient heat dissipation, and seamless integration, facilitating its harmonious assimilation into diverse electronic products.
• Headphone amplifier: Although the power consumption of TDA2009A is very small, it is also suitable for some low-power headphone amplifiers. This can be used in the design of portable audio devices or low-cost audio amplifiers.
• Electronic production projects: It is suitable for various DIY electronic production projects such as electronic toys, small sound systems and audio amplifier boards. Due to its easy-to-use characteristics, TDA2009A is not only suitable for beginners in electronic production, but also for electronic enthusiasts with certain experience. Through simple pin connections and voltage settings, we can successfully apply it to various electronic devices to achieve efficient audio amplification functions.
• Audio preamplifier: TDA2009A can be used to amplify the preamplifier signal. This is very helpful in building a complete stereo system as it provides power to the main speakers.
• Car audio system: It can be used in car audio systems to pass the output signal from a CD player, amplified radio or other audio source to the car speakers. It can effectively improve the sound quality, allowing drivers to enjoy a clearer music experience in the car.
• Small sound system: It can be used to build small sound systems such as portable speakers, PC speakers and desktop speakers. It provides enough audio power to drive small speakers and produce suitable sound levels.
• Pay attention to the stability of the power supply: The stability of the power supply has an important impact on the working performance of the power amplifier equipment. Power supply fluctuations may cause the amplifier equipment to work abnormally or even damage the equipment. Therefore, in order to ensure the normal operation of the power amplifier equipment, we must take measures to ensure the stability of the power supply. This can be achieved by using high-quality power equipment, using parallel power filters, or adding voltage regulators.
• Avoid overloading: Although TDA2009A has a large output power, it cannot be overloaded. Overloading can cause the amplifier to overheat or even be damaged.
• Arrange wiring properly : We must ensure the correct connection of input and output lines to prevent short circuits or open circuits. In the design, we should not mix the input and output lines to avoid adversely affecting the performance of the amplifier.
• Proper use of overheating protection circuit: The overheating protection circuit can effectively prevent the amplifier from being damaged due to overheating. When an overheating condition occurs, the amplifier automatically enters a protection state. At this time, we should take heat dissipation measures immediately, and then restart the device after the temperature drops.
• Regular inspection and maintenance: We should regularly check whether the connection of the equipment is normal to ensure that the equipment can operate normally. Secondly, we must clean up dust in time and keep the equipment clean to reduce the failure rate. In addition, we need to replace wearing parts such as filter capacitors to ensure the performance of the equipment and extend the service life of the amplifier.
Frequently Asked Questions
1. What is the TDA2009A?
The TDA2009A is an integrated audio amplifier circuit designed for use in car audio systems and other low-power audio applications. It is commonly used to amplify audio signals for speakers.
2. What is the equivalent of TDA2009A?
The equivalent for TDA2009A are ECG7105 and NTE7105.
3. What is the voltage supply range of the TDA2009A?
The TDA2009A typically operates on a supply voltage range of 8V to 28V.
4. What are some typical applications for the TDA2009A?
Typical applications for the TDA2009A include car audio amplifiers, portable speakers, and other low-power audio amplification needs.
