TDA7295S

Overview

The TDA7295S is a monolithic Class AB audio amplifier in a Multiwatt15 package. It operates on a supply voltage range of ±10V to ±40V, delivering up to 80W music power into 4Ω or 8Ω loads at 10% THD. Key electrical parameters include an open-loop gain of 80dB, input offset voltage of ±10mV, and quiescent current of 30mA typical. The device features a DMOS power stage with short circuit protection, thermal shutdown at 150°C, and mute/stand-by functions.

Feature Summary

• DMOS power stage technology for high output power and immunity to secondary breakdown
• Integrated mute and stand-by functions with turn-on delay to eliminate switching noises
• Modular capability allowing multiple devices to be connected in parallel via pin 11
• Built-in clip detector and comprehensive protection against short circuits and thermal overload

Applications

• Hi-Fi home stereo systems
• Self-powered loudspeakers
• Top-class television audio outputs
• HI-FI subwoofers using bridge configuration
• High-efficiency amplifier designs utilizing bootstrap power supplies

Procurement Notes

Verify the obsolete status of this component before design finalization. Confirm that the Multiwatt15 V package dimensions match the target PCB footprint. Ensure the design accounts for the required heatsink thermal resistance, as continuous RMS power exceeding 50-60W necessitates high-efficiency circuit topologies to manage junction temperatures effectively.

Selection Notes

Select this component for applications requiring high voltage operation up to ±40V and significant current delivery capabilities. It is suitable for designs needing low distortion and integrated protection without external Boucherot cells under standard conditions. Consider the modular application mode if driving very low impedance loads requires increased current capacity beyond single-device limits.

Part Context

This part belongs to the TDA7295 series of DMOS audio amplifiers manufactured by STMicroelectronics. It utilizes Multipower BCD technology to achieve high performance in a linear integrated circuit format. The device is designed to replace discrete solutions while offering simplified implementation through integrated protection and control logic.

Replacement Considerations

TDA7295 (Standard version)

FAQ

How does the modular application function?

Multiple devices can operate in parallel by connecting them via pin 11. One device acts as the master, while others act as slaves. Slave inputs are grounded, and their bootstrap capacitors must be scaled by the number of devices.

What is the purpose of the clip detector?

The clip detector provides a signal indicating when the output is clipping. This feature helps in monitoring amplifier performance and protecting downstream components from excessive distortion.

Can the TDA7295S operate without Boucherot cells?

Yes, the device is designed to operate stably without Boucherot cells under normal conditions. However, they may be required if speakers are connected via long wires to prevent spurious oscillations during terminal shorts.