Overview
The TDA7294S, produced by STMicroelectronics, is a monolithic integrated circuit designed for use as an audio class AB amplifier in Hi-Fi field applications. It is packaged in a Multiwatt15 configuration and is suitable for various audio systems, including home stereo, self-powered loudspeakers, and high-class TV systems. The TDA7294S is known for its wide voltage range and high output current capability, enabling it to deliver high power into both 4Ω and 8Ω loads, even with poor supply regulation. The built-in muting function with turn-on delay simplifies remote operation and avoids switching on-off noises.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | ±10 to ±40 | V |
| Output Peak Current | 10 | A |
| Total Power Dissipation (Tcase = 70°C) | 50 | W |
| Operating Ambient Temperature Range | 0 to 70 | °C |
| Storage Temperature | -40 to 150 | °C |
| Junction Temperature | 150 | °C |
| Thermal Resistance Junction-case | 1.5 | °C/W |
| Continuous Output Power (VS = ±35V, RL = 8Ω) | Up to 100W | W |
| Input Resistance | 100 kΩ | kΩ |
| Frequency Response (-3dB) | 20 Hz to 20 kHz | Hz |
| Total Harmonic Distortion (PO = 5 W, f = 1 kHz) | 0.005% | % |
Key Features
- High Output Power: Up to 100W music power into 8Ω loads and up to 150W into 4Ω loads.
- Very Low Distortion: Ensures high-fidelity sound quality.
- DMOS Power Stage: High efficiency and reliability.
- Muting/Stand-by Functions: Independently driven by CMOS logic-compatible input pins, avoiding switching on-off noises.
- No Switch On/Off Noise: Optimized circuits to prevent audible transients.
- Short Circuit Protection and Thermal Shutdown: Enhanced reliability and safety.
- Low Noise: High signal-to-noise ratio (SNR).
- Flexible Configuration: Can be used in single-ended or bridged configurations.
Applications
The TDA7294S is widely used in various audio applications, including:
- Home Stereo Systems: Ideal for high-quality home audio setups.
- Self-Powered Loudspeakers: Suitable for powered speakers requiring high output power.
- Top-Class TV Systems: Enhances audio quality in high-end TV systems.
- Car Audio Systems: Specifically, the TDA7294S model is designed for harsh car environments.
- Professional Audio Equipment: Used in various professional audio applications requiring high power and low distortion).
Q & A
- What is the maximum output power of the TDA7294S?
The TDA7294S can deliver up to 100W of output power into an 8Ω load and up to 150W into a 4Ω load).
- What is the operating voltage range of the TDA7294S?
The operating voltage range is ±10V to ±40V).
- Does the TDA7294S have built-in protection features?
Yes, it includes short circuit protection, thermal shutdown, and over-current protection).
- What is the frequency response of the TDA7294S?
The frequency response is 20 Hz to 20 kHz).
- Can the TDA7294S be used in bridged configurations?
Yes, it can be used in bridged configurations to achieve higher output power).
- What is the thermal resistance junction-case of the TDA7294S?
The thermal resistance junction-case is 1.5°C/W).
- Does the TDA7294S have muting and stand-by functions?
Yes, it has independently driven muting and stand-by functions).
- What is the input resistance of the TDA7294S?
The input resistance is 100 kΩ).
- Is the TDA7294S suitable for car audio systems?
Yes, specifically the TDA7294S model is designed for harsh car environments).
- What is the typical quiescent current of the TDA7294S?
The typical quiescent current is 20-30 mA).
