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

STMicroelectronics TDA7261

Name: TDA7261
Brand: STMicroelectronics
SKU: TDA7261
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7261

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: Multiwatt-8 (Straight Leads)

Datasheet:: TDA7261.pdf

Description:: IC AMP AB MONO 32W 8MULTIWATT

Quantity:: RFQ Add To RFQ list

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Inventory:1,346

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Product details

Overview

TDA7261 from STMicroelectronics is a Class AB mono audio power amplifier in Multiwatt-8 package, delivering 25W into 8Ω at 10% THD with ±20V supply, featuring mute/standby control, pop-free turn-on/off, short-circuit and thermal protection-designed for mono TV chassis audio output stages.

For engineers reviewing the TDA7261 datasheet, TDA7261 pinout, TDA7261 application, or TDA7261 equivalent, key selection considerations include its wide ±5V to ±22.5V supply range, 30mA quiescent current in active mode, 3mA in stand-by, 60–90dB mute attenuation, and integrated protection architecture for robust consumer audio deployment.

Technical Context

The TDA7261 employs a dual-rail Class AB output stage with internal current limiting (4.5A peak) and thermal shutdown at 145°C junction temperature. Its MUTE/ST-BY pin (Pin 4) implements two voltage thresholds referenced to +VS: stand-by below +VS − 2.5V, mute between +VS − 2.5V and +VS − 6V, and play above +VS − 6V.

It achieves 0.02% THD at 1W/1kHz (8Ω), 10V/µs slew rate, and 30dB closed-loop gain with ±0.2dB matching. Supply rejection is 60dB at 100Hz, and input noise is 2.5–3.5µV (A-weighted, 20Hz–22kHz), supporting high-fidelity mono amplification without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	25W @ THD = 10%, RL = 8Ω, VS = ±20V - sufficient for mid-power TV/audio monitor speakers
Supply Range	±5V to ±22.5V DC - supports wide-input SMPS or linear supplies in cost-sensitive consumer designs
THD+N	0.02% @ 1W, 1kHz, 8Ω - meets Hi-Fi linearity requirements for audible clarity
Quiescent Current	30mA (active), 3mA (stand-by) - enables low-power idle states in always-on TV systems
Mute Attenuation	60–90dB - eliminates audible click/pop during channel switching or power cycling
Thermal Shutdown	145°C junction - protects against sustained overload or heatsink failure
Input Impedance	15–20kΩ - compatible with standard preamp outputs without loading

Pinout & Package

Package: Multiwatt-8 (vertical, tab-connected to Pin 5), thermally enhanced plastic package with isolated mounting tab; R_{th j-case} = 2.5°C/W max.

Pin/Terminal	Circuit Role	Design Meaning
1	No Connect	Internally unused; must be left open or grounded per layout guidelines
2	Inverting Input (−)	Differential input node; referenced to ground via feedback network
3	Non-inverting Input (+)	Main signal input; high-impedance (15–20kΩ), DC-coupled via 1µF capacitor
4	MUTE/ST-BY Control	Voltage-controlled mode selector: play/mute/stand-by via thresholds relative to +VS
5	GND	Analog ground reference; tab internally connected to this pin for thermal path
6	Output	Class AB push-pull output; drives 4–8Ω loads directly; requires 100nF stability capacitor
7	+VS	Positive supply rail; accepts up to +50V absolute max (DC)
8	−VS	Negative supply rail; accepts down to −50V absolute max (DC)

Key Features

Feature	Design Value
Pop-free turn-on/off	Internal soft-start and mute sequencing eliminate transient clicks during power transitions
Two-mode control pin	Single Pin 4 provides both mute (60–90dB) and stand-by (110dB, 3mA IQ) via analog voltage thresholds
Few external components	Operates with only 7 passive parts (2x1µF, 2x1000µF, 2x100nF, 4.7Ω) - reduces BOM count and PCB area
Integrated protection	Short-circuit limiting (4.5A peak), thermal shutdown (145°C), and safe operating area (SOA) enforcement
Wide supply tolerance	Stable operation from ±5V to ±22.5V - accommodates aging PSUs and variable line conditions

Applications

TV Audio Output Stage

Monitor Speaker Amplifier

Use Scenario: Mono audio amplification in CRT/LCD TV chassis where space and cost are constrained.

IC Role / Device Role / Timing Role: Final power stage driving 8Ω speaker directly from preamp-level signal.

Use Value: 25W output with <0.02% THD ensures clear dialogue reproduction without heatsink oversizing.

Use Scenario: Standalone desktop monitor with built-in speaker requiring low-noise amplification.

IC Role / Device Role / Timing Role: Single-channel Class AB amplifier with mute/stand-by for user interface integration.

Use Value: 3mA stand-by current and pop-free switching enable energy-compliant sleep modes and silent power toggling.

Set-Top Box Audio

Legacy Home Audio Mixer

Use Scenario: Audio output for digital broadcast receivers needing reliable, low-component-count amplification.

IC Role / Device Role / Timing Role: Mute-controlled mono driver synchronized to video signal presence detection.

Use Value: 60–90dB mute attenuation prevents burst noise during channel change or firmware update.

Use Scenario: Compact analog audio mixer output stage feeding powered monitors or headphones.

IC Role / Device Role / Timing Role: High-SR (10V/µs), low-noise (2.5µV) final stage preserving transient fidelity.

Use Value: 10V/µs slew rate and 20–15kHz flat frequency response maintain percussive attack and vocal clarity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar mono Class AB audio amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA2030A	Lower max supply (±18V), 14W output, no integrated mute/stand-by pin	Requires external logic for mute control; less suitable for automated power management	Choose when cost is critical and system-level mute is already implemented
LM1875	Higher THD (0.015% typ. but degrades faster above 5W), no thermal shutdown, TO-220 package	Lacks integrated protection and low-IQ stand-by; needs external thermal cutoff	Prefer for discrete design flexibility where heatsinking and protection are handled externally

Compared with TDA7261, TDA2030A offers lower cost but sacrifices integrated control and power capability, while LM1875 delivers higher peak headroom but demands more board space and external safety circuitry-making TDA7261 optimal for compact, self-protected TV/audio chassis.

Availability

TDA7261 is available at Aetrix Electronics and suitable for TV audio output stages, monitor speaker amplifiers, set-top box audio subsystems, and legacy home audio mixers requiring stable component supply and long-lifecycle support.

Supply support for TDA7261 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The TDA7261 belongs to ST's legacy audio power amplifier product line, engineered specifically for cost-effective, high-reliability mono audio output in mass-market consumer displays and entertainment systems.

FAQ

What is the maximum safe supply voltage for continuous operation of the TDA7261?

The TDA7261 supports continuous operation up to ±22.5V DC supply (45V total differential), with an absolute maximum rating of ±50V. Exceeding ±22.5V risks exceeding thermal limits under load and may trigger premature thermal shutdown or reduce reliability. Designers should size heatsinks per R_{th j-case} = 2.5°C/W and derate power above ±18V.

How does the MUTE/ST-BY pin (Pin 4) function in practice?

Pin 4 operates as a single analog control input referenced to +VS: below +VS − 6V = play mode; between +VS − 6V and +VS − 2.5V = mute mode (60–90dB attenuation); above +VS − 2.5V = stand-by (110dB attenuation, 3mA IQ). It requires no external logic-only a resistor divider or microcontroller GPIO with level-shifting.

Can the TDA7261 drive a 4Ω speaker, and what output power is achievable?

Yes-the TDA7261 drives 4Ω loads, delivering 25W at 10% THD with ±16V supply. At ±20V, output is limited by thermal constraints rather than current; full 32W music power is specified only at ±22.5V/8Ω. For 4Ω, use ≥1000µF bulk capacitance per rail and ensure heatsink thermal resistance ≤ 2.5°C/W.

Does the TDA7261 require external compensation capacitors, and which ones are mandatory?

Yes-external capacitors are mandatory for stability and performance: 100nF between Pin 6 (output) and Pin 5 (GND) for high-frequency compensation; two 1000µF electrolytics on +VS and −VS rails for supply decoupling; and 1µF input coupling on Pin 3. Omitting the 100nF capacitor risks oscillation, especially with long speaker traces or reactive loads.

TDA7261 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: Multiwatt-8 (Straight Leads)

Packaging:: Tube

Product Status:: Obsolete

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 32W x 1 @ 8Ohm

Voltage - Supply:: 10V ~ 45V, ±5V ~ 22.5V

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

Mounting Type:: Through Hole

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: 8-Multiwatt

TDA7261 FAQ

1.How can I place an order for TDA7261 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7261 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 TDA7261 reliable?

The price and inventory of TDA7261 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7261 is usually 5 days.

3.What payment methods are accepted for TDA7261?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7261 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7261?

TDA7261 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7261 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 TDA7261?

For technical support, including TDA7261 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7261 requirements.

6.How does Aetrix verify that TDA7261 is sourced from the original manufacturer or authorized distributors?

All TDA7261 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 TDA7261 meets industry standards.

7.What is the process for return or replacement of TDA7261?

All TDA7261 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7261, 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 TDA7261 part is unused and in its original packaging.

Return procedure for TDA7261:

1.Submit a request within 90 days.

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

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