TDA7294S

Overview

The TDA7294S is a monolithic Class AB audio amplifier in a Multiwatt15 package. It operates on a supply voltage of ±12V to ±45V and delivers up to 100W music power into an 8Ω load at ±40V with 10% THD. The device features a DMOS power stage, mute/stand-by functions, thermal shutdown, short circuit protection, and a clip detector. It supports modular parallel operation for driving low impedances.

Feature Summary

• DMOS power stage technology
• Muting and stand-by functions
• Thermal shutdown and short circuit protection
• Clip detector output

Applications

• Home stereo systems
• Self-powered loudspeakers
• Top-class TV applications

Procurement Notes

Verify component authenticity as the TDA7294S is marked obsolete. Confirm pinout alignment with Multiwatt15 vertical specifications. Ensure adequate heatsinking due to high power dissipation requirements. Check for RoHS3 compliance status. Validate that replacement components match electrical characteristics.

Selection Notes

Select this component for high-power Hi-Fi applications requiring robust protection features. Consider its wide operating voltage range and high current capability. Evaluate thermal management needs for continuous RMS power exceeding 50W. Assess compatibility with existing circuit designs for bridge or modular configurations.

Part Context

Part of the TDA7294 series by STMicroelectronics. Utilizes MultiPower BCD technology. Designed for linear integrated circuits in consumer electronics. Offers high performance matching discrete designs at lower cost. Immune from secondary breakdown phenomena typical of bipolar technologies.

Replacement Considerations

TDA7293V is listed as a similar substitute part number.

FAQ

What is the maximum supply voltage?

±45V under operating conditions, with ±50V absolute maximum rating without signal.

How does the clip detector function?

It provides a duty cycle signal proportional to clipping levels, useful for monitoring distortion thresholds.