100W power amplifier circuit diagram TDA7293

The TDA7293, produced by the ST (SGS-THOMSON) company, is a high-power, high-voltage DMOS high-fidelity amplifier integrated circuit (IC) with a rated output power of 100W. It operates at a maximum voltage of 120V. The key specifications include a dual power supply voltage range of 12V to 50V, an output power of 14W at 45V across an 8-ohm load, an open-loop voltage gain of 80 dB, a conversion rate of 15 V/µs, and an output current capability of 6.5 A. The input impedance ranges from 100 kΩ to 150 kΩ. The internal structure of the TDA7293 consists of three levels: a differential input stage utilizing bipolar transistors, and a power output stage employing FET technology. This architecture combines the low noise and linear temperature coefficient benefits of bipolar transistors with the advantages of low distortion and high efficiency found in MOS power transistors. Additionally, the TDA7293 features built-in thermal protection, short circuit protection, and other beneficial characteristics. The IC is housed in a 15-pin package with specific functions assigned to each pin, including standby, input terminals, ground, power supply inputs, and feedback connections.

The TDA7293 amplifier IC is designed to deliver high-quality audio amplification suitable for various applications, such as home audio systems, professional audio equipment, and automotive sound systems. Its robust output power allows it to drive speakers effectively while maintaining audio fidelity. The differential input stage ensures that the amplifier can handle a wide range of input signals, providing excellent performance with minimal distortion.

The pin configuration of the TDA7293 is critical for its operation. The standby pin (pin 1) allows for power management, enabling the device to enter a low-power state when not in use. The inverting (pin 2) and non-inverting (pin 3) input terminals accept audio signals, which are processed by the internal circuitry. Ground (pin 4) provides a reference point for the amplifier, while the short-circuit current detection terminal (pin 5) is typically left unconnected in standard applications.

Power supply connections are divided between the signal processing section and the power output stage, with pins 7 and 8 dedicated to the positive and negative power supply inputs for the signal processing, respectively. Pins 13, 14, and 15 serve similar roles for the power output stage, ensuring that the amplifier can operate efficiently under load. The feedback input (pin 12) is crucial for maintaining stability and linearity in the amplification process.

Overall, the TDA7293 is a versatile and powerful amplifier IC that combines advanced technology with practical features, making it an excellent choice for audio enthusiasts and professionals seeking high-performance amplification solutions. Its design emphasizes reliability and sound quality, making it suitable for a wide range of audio applications.Although the TDA7293 longer beautiful, but in fact excellent strength, still have to tell you about, for enthusiasts may be a review. TDA7293 is ST (SGS-THOMSON) company produc ed a high-power high-voltage DMOS high-fidelity amplifier IC, rated output power of 100W. The maximum operating voltage is 120V. The main parameters are as follows Parameter Min Typ Max Unit Power supply voltage (dual power) 12 50 6V Output power Vs 45V R 8 14W Open loop voltage gain cover 80 dB Conversion rate 15 v/S Output current 6.5 A Input impedance 100 120 150 K TDA7293 internal structure is divided into three levels: a differential input stage by a bipolar transistor, and to promote the level of power output stage FET, this structure can be integrated bipolar transistors and power FET low noise linear temperature coefficient advantage on the tone. Awesome, taking into account the advantages of the signal processing circuit of bipolar and MOS power transistor with low distortion, low noise and silence, as well as high pressure switch, thermal protection, short circuit protection and other advantages.

TDA7293 is a 15-pin package. TDA7293 role of the foot as follows: 1 foot to standby; 2 feet inverting input terminal; 3 feet is a positive phase input terminal; 4 feet is the ground; 5 feet short circuit current detection terminal, usually as vacant; 6 feet bootstrap end; 7 feet is the positive power supply input (signal processing section); 8 pin is a negative power supply input (signal processing section); 9 feet standby end; 10 feet is muted end; 11 is buffered drive output (bridged when use); 12 feet is the feedback input terminal; 13 feet is the positive power supply input terminal (power output stage section); a power output of 14 feet; 15 feet is a negative power input (power output stage section). Figure 3 TDA7293 amplifier circuit diagram of a typical