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

STMicroelectronics TDA7267A

Name: TDA7267A
Brand: STMicroelectronics
SKU: TDA7267A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7267A

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: TDA7267A.pdf

Description:: IC AMP AB MONO 3W 16POWERDIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,950

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Product details

Overview

TDA7267A from STMicroelectronics is a mono Class-AB audio power amplifier in PowerDIP-16 package, delivering 3W into 8Ω at 10% THD with 14.5V supply, fixed 32dB gain, no external feedback capacitor, and integrated thermal/short-circuit protection - used in TV audio output stages.

For engineers reviewing the TDA7267A datasheet, TDA7267A pinout, TDA7267A application, or TDA7267A equivalent, key selection criteria include rail-to-rail complementary output swing without bootstrap capacitors, SVR of 50dB at 1kHz, stand-by current of 0.3mA, and PCB copper-area–based heatsinking requirements per R_{th j-amb} = 70°C/W.

Technical Context

The TDA7267A employs a fully complementary push-pull output stage enabling rail-to-rail voltage swing without bootstrap capacitors, eliminating Boucherot cell and external feedback components. Its internal fixed-gain architecture (32dB typ.) simplifies design for cost-sensitive TV audio systems.

It integrates multiple protection mechanisms: thermal shutdown triggered at T_j = 150°C, AC short-circuit detection on the output, and stand-by mode activated by grounding Pin 3 (I_sb = 0.3mA). Supply ripple rejection is enhanced via dedicated SVR pin with external 470µF capacitor.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	3W into 8Ω @ THD = 10%, VS = 14.5V - sufficient for compact TV speaker drivers without external heat sink beyond PCB copper area.
Voltage Gain	32dB (typ.) - fixed internal gain eliminates need for external gain-setting resistors, reducing BOM count.
Supply Voltage Range	5–18V - supports standard TV supply rails including 12V and 14.5V nominal operation.
THD+N	0.1–0.3% @ 1W, 1kHz - low distortion ensures acceptable audio fidelity for consumer TV applications.
SVR	50dB @ 150mV_rms, 1kHz - suppresses power supply noise coupling into audio path using dedicated SVR pin and bulk capacitor.
Stand-by Current	0.3mA - enables low-power mute state during TV standby, critical for energy compliance (e.g., EU ErP).
Input Impedance	50–100kΩ - compatible with line-level preamp outputs without loading effects.

Pinout & Package

Package: PowerDIP-16 (16-pin dual-in-line with 8+8 staggered lead configuration, 2.54mm pitch, 20mm body width), optimized for vertical PCB mounting with board-level copper heatsinking.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 6, 7, 10–12, 14–16	P-GND	Power ground terminals - all internally connected; must be tied to large low-impedance PCB copper pour for thermal dissipation and noise control.
3	STAND-BY	Active-low enable: grounding enters 0.3mA stand-by mode; open or pulled high enables operation.
5	S-GND	Signal ground - separate from P-GND to minimize ground loop noise in sensitive input path.
8	IN	Differential-capable single-ended audio input - accepts line-level signal referenced to S-GND.
9	OUT	Amplified output - drives 8Ω speaker directly; rail-to-rail swing enabled by complementary output stage.
13	SVR	Supply voltage rejection pin - requires 470µF electrolytic capacitor to GND for improved ripple suppression.
VS (Pin 13 not used for VS; supply applied to Pins 11 & 12)	Supply Input	14.5V nominal applied across P-GND pins (e.g., Pins 11/12) - distributed across multiple pins to reduce current density and thermal stress.

Key Features

Feature	Design Value
Rail-to-rail complementary output	Eliminates need for bootstrap capacitors and enables full supply swing into 8Ω load without dead zone.
No external feedback capacitor	Reduces component count and PCB area; internal compensation ensures stability with 8Ω load and typical decoupling.
Integrated thermal protection	Shuts down output at 150°C junction temperature and auto-recovers when cooled - prevents permanent damage during overload or poor heatsinking.
Low turn-on/off pop	Minimizes audible transients during power-up/down sequences, improving user experience in TV remote-controlled operation.
SVR pin with dedicated capacitor	Enables >50dB supply ripple rejection using external 470µF capacitor, isolating audio path from noisy SMPS rails.

Applications

TV Audio Output Stage

Set-Top Box Speaker Driver

Use Scenario: Driving built-in mono speaker in CRT/LCD TVs with 12–14.5V supply and space-constrained PCB layout.

IC Role / Device Role / Timing Role: Final-stage mono audio power amplifier with fixed gain and integrated protection.

Use Value: Eliminates external feedback and bootstrap components, reduces BOM cost by ≥3 parts, and meets CE/ErP standby power requirements via 0.3mA I_sb.

Use Scenario: Amplifying decoded audio from HDMI/SPDIF receivers in compact set-top boxes with limited heatsinking area.

IC Role / Device Role / Timing Role: Low-noise, low-THD mono output driver interfacing between DAC and 8Ω speaker.

Use Value: 0.1–0.3% THD+N at 1W ensures clear voice reproduction; SVR pin rejects switcher noise from shared 12V rail.

Monitor Integrated Speaker

Legacy Display Audio Module

Use Scenario: Adding basic audio playback to VGA/DVI monitors using existing 12V auxiliary supply and minimal PCB real estate.

IC Role / Device Role / Timing Role: Stand-alone mono amplifier with thermal/short-circuit protection for unattended operation.

Use Value: Rail-to-rail output delivers full 3W without external components; P-GND pins support direct copper heatsinking on 2-layer board.

Use Scenario: Retrofitting audio capability into older industrial displays using legacy 14.5V linear supplies.

IC Role / Device Role / Timing Role: Drop-in mono amplifier replacement for obsolete audio ICs requiring identical PowerDIP-16 footprint.

Use Value: Pin-compatible with TDA7265/TDA7266 family; same thermal pad layout and protection behavior simplifies redesign.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7265	Higher output power (5W @ 8Ω), wider supply range (±5V to ±22V), dual-channel; requires dual supply and larger heatsink.	Designed for stereo or higher-power mono applications; not pin-compatible due to different pinout and dual-supply requirement.	Select when >3W output or dual-channel operation is needed; avoid for single-supply TV designs.
LM386N-1	Lower power (0.7W), internal gain fixed at 20dB, no SVR pin or thermal shutdown; SOIC-8 package.	Targeted at ultra-low-cost portable audio; lacks protection features and PCB heatsinking capability of PowerDIP-16.	Choose only for battery-powered, non-critical applications where size and cost outweigh reliability and thermal robustness.

Compared with TDA7267A, TDA7265 offers higher power but demands dual supply and more complex layout, while LM386N-1 sacrifices protection, thermal performance, and ripple rejection for minimal BOM - making TDA7267A optimal for reliable, single-supply TV audio with board-level thermal management.

Availability

TDA7267A is available at Aetrix Electronics and suitable for TV audio output stages, set-top box speaker drivers, monitor integrated speakers, and legacy display audio modules requiring stable component supply and long-lifecycle support.

Supply support for TDA7267A 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 TDA7267A belongs to ST's legacy audio power amplifier product line, engineered specifically for cost-sensitive, single-supply TV and display audio applications with integrated protection and simplified external component requirements.

FAQ

What is the minimum recommended PCB copper area for thermal management?

Per ST's thermal data, a 44.4°C/W external thermal resistance is required at 70°C ambient. With R_{th j-case} = 15°C/W, a PCB copper heatsink area of ≥50 cm² (square layout) is recommended. Use multiple P-GND pins connected to solid inner-layer ground planes and thermal vias to inner ground layers.

Can the TDA7267A operate from a 12V supply?

Yes - the device operates from 5V to 18V. At 12V/8Ω, typical output power is ~2.1W (THD = 10%). Quiescent current drops to ~28mA, reducing thermal load. Ensure SVR capacitor (470µF) and input/output decoupling remain unchanged for stable operation.

Is the TDA7267A still in active production?

No - STMicroelectronics has marked TDA7267A as obsolete (as noted on page 1 of the datasheet). However, Aetrix Electronics maintains legacy inventory and provides extended lifecycle support, including obsolescence mitigation planning and cross-reference assistance for drop-in replacements.

Why does the pinout show multiple P-GND pins but only one S-GND?

The eight P-GND pins handle high-current return paths from the output stage and supply, minimizing IR drop and thermal rise. S-GND (Pin 5) serves only the low-current input and bias circuitry, isolating sensitive analog nodes from power ground noise - essential for achieving <10µV input noise and low THD.

TDA7267A Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 3W x 1 @ 8Ohm

Voltage - Supply:: 5V ~ 18V

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

Mounting Type:: Through Hole

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

Grade:: -

Qualification:: -

Supplier Device Package:: 16-PowerDIP

TDA7267A FAQ

1.How can I place an order for TDA7267A through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7267A 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 TDA7267A reliable?

The price and inventory of TDA7267A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7267A is usually 5 days.

3.What payment methods are accepted for TDA7267A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7267A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7267A?

TDA7267A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7267A 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 TDA7267A?

For technical support, including TDA7267A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7267A requirements.

6.How does Aetrix verify that TDA7267A is sourced from the original manufacturer or authorized distributors?

All TDA7267A 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 TDA7267A meets industry standards.

7.What is the process for return or replacement of TDA7267A?

All TDA7267A units undergo pre-shipment inspection (PSI). If there is an issue with TDA7267A, 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 TDA7267A part is unused and in its original packaging.

Return procedure for TDA7267A:

1.Submit a request within 90 days.

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

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