STMicroelectronics TDA7293V

Overview

TDA7293V from STMicroelectronics is a monolithic Class AB audio power amplifier IC in Multiwatt15V package, designed for high-fidelity audio output stages. It delivers 100 W into 8 Ω at ±40 V supply with 10% THD, features integrated mute and standby functions with CMOS-compatible control inputs, and supports modular parallel operation for low-impedance loads in home stereo and powered loudspeaker systems.

For engineers reviewing the TDA7293V datasheet, TDA7293V pinout, TDA7293V application, or TDA7293V equivalent, key selection considerations include its ±50 V operating voltage range, DMOS output stage, thermal shutdown at 160 °C, clip detection on Pin 5, and bootstrap-capable dual power supply architecture (±Vs signal + ±PWVs power rails).

Technical Context

The TDA7293V employs Multipower BCD II 100/120 technology to combine bipolar precision circuitry with DMOS power transistors, eliminating second breakdown limitations and enabling safe operation into reactive 4 Ω and 8 Ω loads. Its output stage uses local linearizing feedback and Miller compensation to maintain low distortion across frequency.

Protection includes dynamic SOA limiting via local temperature sensing, thermal shutdown (mute at 150 °C, standby at 160 °C), short-circuit protection with no input signal applied, and ESD tolerance of ±1500 V HBM. Mute and standby are independently controlled via logic-level pins with defined thresholds (1.5 V ON / 3.5 V OFF) and attenuation >70 dB.

Key Specifications

Pinout & Package

The TDA7293V is housed in a vertically mounted Multiwatt15V package with exposed metal tab (Pin 8) thermally and electrically connected to –VS (power ground). The 15-pin layout supports dual-rail power separation (signal and power supplies), bootstrap operation, and modular parallel configuration via Pin 11.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage audio amplifier applications.

Compared with TDA7294V and LM3886TF, the TDA7293V uniquely combines ±50 V operation, clip detection, mute/stby logic, and modular parallel support-making it the sole option for scalable, feature-rich, high-power monolithic audio systems requiring design longevity and serviceability.

Availability

TDA7293V is available at Aetrix Electronics and suitable for home stereo amplifiers, self-powered loudspeakers, and top-class flat-panel TV audio systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TDA7293V includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in analog, power, and automotive ICs with vertical manufacturing capabilities and AEC-Q100 qualified processes.

The TDA7293V belongs to ST's high-voltage audio amplifier product line, engineered specifically for Hi-Fi and professional audio applications demanding >100 W output, ultra-low distortion, and integrated system-level features like mute, standby, and thermal protection.

FAQ

What is the maximum safe supply voltage for TDA7293V with bootstrap connected between Pins 6 and 12?

The absolute maximum supply voltage is ±60 V with no signal applied, but continuous operation with signal is rated to ±50 V. When bootstrap is connected between Pin 6 and Pin 12, the internal clamp at Pin 12 enables full 120 V technology rating-allowing ±50 V rails with 20 V headroom for transient peaks without capacitor overvoltage.

How does the modular parallel mode affect thermal management compared to single-device operation?

In modular mode, total output current capacity scales linearly with device count, but thermal dissipation per device decreases due to current sharing. For N devices, the bootstrap capacitor must be increased to 22 µF × N, and all SGND pins must connect to –VS to maintain consistent thermal reference-ensuring junction temperatures remain balanced within ±2 °C across units.

Can TDA7293V be used in bridge-tied load (BTL) configuration, and what are the minimum load requirements?

Yes, TDA7293V supports BTL operation using two devices per channel. Minimum load is 8 Ω to prevent excessive current stress on the DMOS output stage; at ±25 V supply, this yields 150 W output. Using lower impedances risks exceeding the 6.5 A current limit and triggering short-circuit protection during transients.

What is the functional difference between Pin 7 (SGND) and Pin 8 (–VS), and why must they be kept separate?

Pin 7 (SGND) is the low-noise analog reference for input and feedback circuitry, while Pin 8 (–VS) is the high-current power return for the DMOS output stage. Separating them prevents large-signal switching noise from modulating the input stage-measured PSRR improves by >20 dB at 1 kHz when SGND is routed directly to input decoupling capacitors instead of joining –VS at the bulk capacitor.