TDA7294 IC 100 watts Audio power amplifier High-Power Audio Amplifier IC TDA 7294 IC TDA7294-MultiwAtt-15

Product Overview

The TDA7294, manufactured by SGS-THOMSON Microelectronics (now STMicroelectronics), is a monolithic integrated circuit in a Multiwatt15 package. It is a high-voltage, 100 V–100 W DMOS audio amplifier designed for high-fidelity class AB applications, such as home stereo systems, self-powered loudspeakers, and high-end televisions.

Core Specifications

• Manufacturer: SGS-THOMSON Microelectronics.

• Technology: Uses Multipower BCD technology (Bipolar, CMOS, DMOS), which combines the benefits of these technologies to handle high voltage and current without the limitations of traditional bipolar-only designs.

• Supply Voltage: Very high operating range of up to ±40 V.

• Output Power: Capable of supplying up to 100 W music power.

• Output Stage: Features a DMOS power stage that is immune to the secondary breakdown phenomenon, allowing for a wider safe operating area (SOA).

Features

• Control Functions: Includes integrated muting and stand-by functions, which are driven by CMOS-compatible pins and include turn-on delays to eliminate audible switching noises.

• Protection Circuitry:

  • Short Circuit Protection: Built-in circuitry protects the device during overloads or short-circuit conditions.

  • Thermal Shutdown: Features a dual-stage thermal shutdown that triggers muting at 145°C and stand-by mode at 150°C.

• Audio Performance: Designed for very low distortion, very low noise, and high supply voltage rejection.

• Efficiency: Can be configured in a "high-efficiency" application using additional power transistors for improved thermal management in high-power setups.

Applications

• Hi-Fi Audio: Used in high-quality home stereo systems and high-end consumer audio.

• Self-Powered Loudspeakers: Suitable for active speaker designs due to its high current capability and integrated control features.

• Subwoofers: Often used in bridge configurations to achieve high power performance with limited supply voltage for subwoofer applications.