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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TDA7294V

Name: TDA7294V
Brand: STMicroelectronics
SKU: TDA7294V
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7294V

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: Multiwatt-15 (Vertical, Bent and Staggered Leads)

Datasheet:: TDA7294V.pdf

Description:: IC AMP AB MONO 100W 15MULTIWATT

Quantity:: RFQ Add To RFQ list

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Inventory:417

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Product details

Overview

TDA7294V from STMicroelectronics is a monolithic Class AB audio power amplifier IC in Multiwatt15V package, designed for high-fidelity audio output stages. It delivers up to 100 W music power into 4 Ω or 8 Ω loads, operates at ±40 V supply, features integrated muting and stand-by functions, and provides <0.01% THD at 5 W (1 kHz) - used in self-powered loudspeakers and premium TV audio systems.

For engineers reviewing the TDA7294V datasheet, TDA7294V pinout, TDA7294V application, or TDA7294V equivalent, key selection criteria include its DMOS output stage, ±50 V absolute max supply rating, thermal shutdown at 145 °C, 70 dB mute attenuation, and dual CMOS-compatible control pins for noise-free turn-on/off sequencing.

Technical Context

The TDA7294V integrates a DMOS unity-gain output buffer with local linearizing feedback and Miller compensation to minimize crossover distortion and maintain wideband stability. Its BCD 100 mixed bipolar-MOS process eliminates second breakdown, enabling safe operation into reactive loads without external Boucherot cells.

Protection architecture combines SOA limiting with dynamic thermal sensing: it enters mute mode at 145 °C junction temperature and full stand-by at 150 °C. Mute and stand-by functions are independently controlled via logic-level inputs referenced to GND or –Vs, with defined thresholds (1.5 V on / 3.5 V off) and >70 dB attenuation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	±10 V to ±40 V - supports high-power delivery into 4 Ω/8 Ω loads even under poor supply regulation.
Output Power (RMS)	60 W @ ±35 V / 8 Ω - continuous power level suitable for Hi-Fi stereo amplification without forced cooling.
Total Harmonic Distortion	0.005 % @ 5 W, 1 kHz - ultra-low distortion ensures accurate midrange and vocal reproduction.
Slew Rate	7 V/μs - enables faithful transient response for dynamic audio signals up to 20 kHz.
Mute Attenuation	60–80 dB - suppresses audible pop/click during state transitions in remote-controlled systems.
Thermal Shutdown Threshold	145 °C - initiates muting before critical junction temperature is reached, preserving reliability.
Input Offset Voltage	±10 mV - minimizes DC offset at speaker terminals, reducing risk of woofer displacement or capacitor stress.
Supply Rejection Ratio	60–75 dB @ 100 Hz - rejects ripple from unregulated supplies, critical in cost-sensitive consumer designs.

Pinout & Package

Multiwatt15V is a 15-lead vertical-mount SIP package with integrated heat sink tab connected to –Vs. Lead pitch is 2.54 mm; body width 17.8 mm; total height ~22.2 mm. Tab must be electrically tied to –Vs rail for thermal and functional integrity.

Pin/Terminal	Circuit Role	Design Meaning
1	–Vs	Negative supply rail input; also connects to metal tab for thermal conduction and reference.
2	In–	Inverting input of differential preamp stage; accepts balanced or single-ended signal with Rg = 50 Ω.
3	In+	Non-inverting input; used with external feedback network to set closed-loop gain (24–40 dB).
4	V_MUTE	CMOS-compatible mute control input; 1.5 V threshold activates >60 dB attenuation, eliminating turn-on noise.
6	V_STBY	CMOS-compatible stand-by control input; 3.5 V threshold disables output stage, reducing I_q to 1–3 mA.
7	Boot–	Bootstrap capacitor connection point for high-side driver; enables rail-to-rail output swing with ±40 V supplies.
8	Out	Amplified analog output; drives 4–16 Ω loads directly; requires external Zobel network only under marginal stability conditions.
9	STBY	Stand-by status output; open-drain logic signal indicating active stand-by state for system coordination.
10	MUTE	Mute status output; open-drain logic signal confirming mute activation for host controller monitoring.
13	+PWVs	Positive power supply for output stage; decoupled separately from signal supply to reduce crosstalk.
14	–PWVs	Negative power supply for output stage; isolated from signal ground to improve PSRR and channel separation.
15	+Vs	Positive supply rail input; powers internal bias and preamp circuitry; shares decoupling with +PWVs in basic designs.

Key Features

Feature	Design Value
No switch-on/off noise	Controlled mute/stand-by sequencing with built-in turn-on delay prevents audible transients in powered speakers.
High supply voltage rejection	75 dB @ 100 Hz allows stable operation with low-cost unregulated transformer-based supplies in home audio.
Integrated short-circuit protection	SOA-limited current foldback combined with thermal sensing prevents latch-up or destruction during speaker wire faults.
DMOS power stage	Eliminates second breakdown, enabling reliable 10 A peak output current into reactive 4 Ω loads without derating.
Independent mute & stand-by	Dual CMOS logic inputs allow separate control of audio blanking (mute) and power gating (stand-by) for flexible system power management.

Applications

Home Stereo Amplifier

Self-Powered Loudspeaker

Use Scenario: Dual-channel 60 W per channel amplifier driving bookshelf speakers in compact living spaces.

IC Role / Device Role / Timing Role: Final Class AB output stage delivering low-distortion analog power; no external driver transistors required.

Use Value: Achieves 60 W RMS into 8 Ω with <0.01% THD using ±35 V rails and minimal external components - reduces BOM count and PCB area.

Use Scenario: Integrated bass/midrange module in active studio monitor with remote volume and power control.

IC Role / Device Role / Timing Role: Primary audio power device with mute/stand-by inputs synchronized to microcontroller GPIOs.

Use Value: 70 dB mute attenuation and pop-free sequencing enable silent wake-up and sleep transitions - essential for USB-C powered monitors.

Premium Television Audio

Hi-Fi Subwoofer Driver

Use Scenario: Embedded 100 W music-power amplifier in flagship OLED TV for immersive soundbar-class output.

IC Role / Device Role / Timing Role: High-current output stage handling dynamic movie soundtracks with IEC 268.3-compliant music power rating.

Use Value: Delivers 100 W music power into 4 Ω at ±38 V with 10% THD - meets broadcast loudness standards without clipping artifacts.

Use Scenario: Single-channel bridge-tied load (BTL) configuration using two TDA7294Vs driving 8 Ω subwoofer in home theater system.

IC Role / Device Role / Timing Role: One IC acts as inverting channel, the other as non-inverting; outputs summed differentially across load.

Use Value: Enables 150 W output at ±25 V supply - doubles effective voltage swing while maintaining thermal safety margin via dual die thermal sensing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7293V	Lower max supply (±35 V), 70 W music power, no boot-strap pins - lacks high-efficiency mode support.	Suitable for cost-sensitive 50 W systems where ±40 V operation is unnecessary.	Select when supply rails ≤ ±35 V and thermal budget allows larger heatsink for same output power.
LM3886TF	Bipolar output stage, ±35 V max, 68 W RMS, no integrated mute/stand-by - requires external logic interface.	Preferred in audiophile discrete-style designs emphasizing harmonic texture over integration density.	Choose when THD+N <0.006% at 1 kHz is prioritized over feature integration and thermal autonomy.

Compared with TDA7294V, TDA7293V trades voltage headroom and efficiency features for lower cost and simpler layout, while LM3886TF offers superior low-level linearity but demands external protection and control circuitry - making TDA7294V optimal for compact, feature-rich, high-power consumer audio.

Availability

TDA7294V is available at Aetrix Electronics and suitable for home stereo amplifiers, self-powered loudspeakers, and premium television audio systems requiring stable component supply across production lifecycles.

Supply support for TDA7294V 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, specializing in analog, power, and automotive ICs with strong European manufacturing and R&D infrastructure.

The TDA7294V belongs to ST's high-voltage audio amplifier product line, engineered specifically for cost-effective, high-fidelity consumer audio applications where integration, thermal resilience, and noise-free control are mandatory.

FAQ

What is the minimum recommended supply voltage for stable operation?

The TDA7294V specifies a minimum supply voltage of ±10 V in absolute maximum ratings and achieves full performance from ±27 V onward. At ±27 V into 4 Ω, it delivers 60 W RMS with 0.01% THD. Operation below ±15 V risks reduced output swing, increased distortion, and potential instability due to insufficient headroom for internal biasing - ST recommends ≥±20 V for production designs.

Can the TDA7294V be used in bridged-tied load (BTL) configuration?

Yes - ST explicitly documents BTL use in Section 11 of DS0013, showing two TDA7294Vs driving an 8 Ω load with ±25 V supplies to deliver 150 W. Each IC operates in standard SE mode; one receives inverted input via external op-amp or resistor network. Critical requirements include matched gain, identical layout symmetry, and independent thermal monitoring - ST confirms this configuration avoids internal phase inversion limitations.

How does the boot-strap function improve efficiency?

The boot-strap circuit (pins 7, 13, 15) dynamically elevates the gate drive voltage of the upper DMOS transistor during positive output swing, enabling full rail-to-rail output voltage swing even at ±40 V supply. This increases effective output power by ~25% versus non-bootstrapped operation and reduces crossover distortion by maintaining optimal quiescent current under large-signal conditions - verified in Figure 20's high-efficiency application circuit.

Is external heat sinking mandatory for 60 W continuous operation?

Yes - at 60 W RMS output into 8 Ω with ±35 V supplies, junction power dissipation exceeds 35 W. With R_th-jcase = 1.5 °C/W, case temperature rises ~53 °C above ambient. To keep T_j ≤ 145 °C (thermal shutdown threshold) at 70 °C ambient, a heatsink with R_{th-sink-ambient} ≤ 1.8 °C/W is required. ST's reference design uses a 200 cm² aluminum finned heatsink - smaller solutions require forced air or derating.

TDA7294V Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: Multiwatt-15 (Vertical, Bent and Staggered Leads)

Packaging:: Tube

Product Status:: Active

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 100W x 1 @ 8Ohm

Voltage - Supply:: ±10V ~ 40V

Features:: Depop, Mute, Short-Circuit and Thermal Protection, Standby

Mounting Type:: Through Hole

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: 15-Multiwatt

TDA7294V FAQ

1.How can I place an order for TDA7294V through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7294V on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TDA7294V reliable?

The price and inventory of TDA7294V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7294V is usually 5 days.

3.What payment methods are accepted for TDA7294V?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7294V transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7294V?

TDA7294V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7294V order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TDA7294V?

For technical support, including TDA7294V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7294V requirements.

6.How does Aetrix verify that TDA7294V is sourced from the original manufacturer or authorized distributors?

All TDA7294V products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA7294V meets industry standards.

7.What is the process for return or replacement of TDA7294V?

All TDA7294V units undergo pre-shipment inspection (PSI). If there is an issue with TDA7294V, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TDA7294V part is unused and in its original packaging.

Return procedure for TDA7294V:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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