TDA7298V

Overview

The TDA7298V is a monolithic Class AB audio power amplifier in the Heptawatt package. It supports split supply operation with a voltage range up to ±22 V and delivers up to 28 W music power into 4 Ω or 8 Ω loads. Key electrical parameters include a quiescent current of 20–70 mA, an open-loop gain of 80 dB, and a slew rate of 3–5 V/μs. The device incorporates thermal shutdown at 145 °C, AC short-circuit protection, and ESD protection.

Feature Summary

• Integrated mute and stand-by functions that eliminate switching on/off noises during remote operations.
• High output current capability ensures stable power delivery even under poor supply regulation conditions.
• Built-in thermal shutdown and AC short-circuit protection mechanisms safeguard the device against overload.

Applications

• TV audio systems
• Hi-Fi field applications
• Home stereo equipment

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm the specific Heptawatt package variant matches design requirements. Check for obsolete status notifications as availability may be limited. Ensure proper thermal management solutions are integrated to maintain junction temperatures within specified limits during operation.

Selection Notes

Select this amplifier for designs requiring high output power with minimal external components. Verify that the power supply can support the required ±22 V range. Ensure the load impedance matches the 4 Ω or 8 Ω specifications for optimal performance. Consider the thermal resistance of the heatsink to prevent triggering thermal shutdown during peak usage.

Part Context

The TDA7298 belongs to STMicroelectronics' line of high-power audio amplifiers designed for consumer electronics. It utilizes advanced DMOS technology to achieve high efficiency and low distortion. The Heptawatt package provides robust thermal dissipation capabilities suitable for compact audio applications.

Replacement Considerations

TDA7298V is marked as obsolete. Consult official documentation for verified substitute part numbers from the same manufacturer family before implementation.

FAQ

How does the TDA7298 handle short-circuit conditions?

The device enters stand-by mode during accidental short-circuits between the output and ground or supply rails, limiting DC current flow to protect the loudspeaker and internal circuitry.

What is the purpose of the Mute/Stand-by pin?

Pin 3 controls the amplifier's operational state. It allows for remote muting and stand-by functions, preventing pop-on noises and reducing power consumption when not in use.