TDA7481

Overview

The TDA7481 is a mono Class-D audio amplifier in a Multiwatt-15 package, designed for TV and home stereo applications. It delivers 18W output power at THD=10% with an 8Ω or 4Ω load. The device operates on a split supply voltage range of ±10V to ±25V. Key electrical parameters include a closed-loop gain of 30dB, total harmonic distortion of 0.1% at 1W into 8Ω, and efficiency up to 85%. It features overvoltage, short-circuit, and thermal overload protection.

Feature Summary

• High-efficiency Class-D architecture optimized for high-power audio applications
• Integrated protection mechanisms including overvoltage, short-circuit, and thermal shutdown
• Supports standby and mute control functions via dedicated pins

Applications

• Television sets
• Home stereo systems

Procurement Notes

Verify component status as the TDA7481 is listed as obsolete by STMicroelectronics. Confirm availability through authorized distributors or secondary market suppliers. Ensure compatibility with existing Multiwatt-15 footprints during design reviews. Check for RoHS compliance details if required for specific regulatory environments.

Selection Notes

Select this component for single-channel high-power audio designs requiring split-rail supplies. The wide supply voltage range accommodates various system architectures. Consider the thermal resistance characteristics when designing heat dissipation solutions. Verify that the required output power aligns with the specified load impedance conditions.

Part Context

This part belongs to STMicroelectronics' audio amplifier portfolio, specifically within the Class-D category. It is engineered for consumer electronics where efficiency and power density are critical. The Multiwatt-15 package facilitates through-hole mounting, suitable for robust industrial or legacy consumer designs.

Replacement Considerations

No officially confirmed substitute part numbers are documented in the provided source material.