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

STMicroelectronics TDA7265B

Name: TDA7265B
Brand: STMicroelectronics
SKU: TDA7265B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7265B

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: Multiwatt-11 (Vertical, Bent and Staggered Leads)

Datasheet:: TDA7265B.pdf

Description:: IC AMP AB STER 30W MULTIWATT-11

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TDA7265B from STMicroelectronics is a Class-AB dual-channel audio power amplifier in Multiwatt11 vertical package, delivering 30 W + 30 W into 8 Ω at 10% THD with ±23 V supply, featuring integrated mute and standby control, thermal shutdown, and short-circuit protection - deployed in stereo TV sets and home entertainment amplifiers.

For engineers reviewing the TDA7265B datasheet, TDA7265B pinout, TDA7265B application, or TDA7265B equivalent, key selection considerations include split-supply operation up to ±35 V, mute/standby threshold voltages referenced to +VS, quiescent current behavior vs. pin 5 voltage, and thermal resistance of 1.5 °C/W for heatsink design.

Technical Context

The TDA7265B implements a dual-channel Class-AB output stage with independent input differential pairs per channel, internally limited peak output current (4 A), and thermally protected junction (shutdown at 145 °C). Its mute and standby functions are controlled by analog voltage thresholds on pin 5 referenced to +VS.

It supports both split-supply (±VS) and single-supply configurations, with open-loop gain of 80 dB, slew rate of 11 V/ms, and crosstalk >70 dB at 1 kHz. Input offset voltage is ±20 mV, and total input noise is 4 µV (20 Hz–22 kHz).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	30 W + 30 W @ THD = 10%, RL = 8 Ω, VS = ±23 V - defines maximum usable RMS output before clipping in consumer-grade speakers.
THD+N	0.02% @ Po = 1 W, RL = 8 Ω - ensures low distortion at typical listening levels without external feedback tuning.
Supply Voltage Range	±8 V to ±33 V (ABS max ±35 V) - enables flexible rail selection for cost/performance trade-offs in compact enclosures.
Mute Attenuation	75 dB - suppresses turn-on/off transients to prevent audible "pops" in speaker systems.
Standby Quiescent Current	8 mA - reduces system-level standby power consumption in energy-compliant AV equipment.
Thermal Resistance	R_{th j-case} = 1.5 °C/W - determines minimum heatsink requirement for continuous 30 W/channel operation at ambient ≤70 °C.
Crosstalk	70 dB @ 1 kHz - maintains channel separation critical for stereo imaging in home audio applications.

Pinout & Package

Package: Multiwatt11 (vertical), thermally enhanced with tab connected to pin 6 (–VS). Requires PCB copper area under tab for heat conduction and mechanical anchoring.

Pin/Terminal	Circuit Role	Design Meaning
1	IN−(L)	Inverting input for left channel - used with external feedback network to set closed-loop gain ≥29 dB.
2	IN+(L)	Non-inverting input for left channel - accepts AC-coupled audio signal via 1 µF capacitor; bias set by internal resistor divider.
3	GND	Analog ground reference - must be star-connected to minimize ground loop noise between channels.
4	IN−(R)	Inverting input for right channel - independently configurable for balanced gain matching with left channel.
5	MUTE/St-By	Control input referenced to +VS - voltage thresholds define three states: play (<+VS−6 V), mute (+VS−6 V to +VS−2.5 V), standby (≥+VS−2.5 V).
6	–VS	Negative supply rail - tab is electrically connected to this pin; requires low-inductance connection to bulk capacitance.
7	OUT(R)	Right channel output - drives 4–8 Ω speaker load directly; includes internal short-circuit protection.
8	+VS	Positive supply rail - supplies both channels; decoupling with ≥1000 µF electrolytic + 0.1 µF ceramic required.
9	OUT(L)	Left channel output - symmetrical to pin 7; layout symmetry minimizes inter-channel crosstalk.
10	IN+(R)	Non-inverting input for right channel - identical DC bias and AC coupling requirements as pin 2.
11	–VS (redundant)	Secondary negative supply connection - improves current distribution and thermal path to tab.

Key Features

Feature	Design Value
No "pop" at turn-on/off	Mute function activated during power sequencing eliminates transient spikes - avoids speaker damage and user annoyance in unattended devices.
Split-supply operation up to ±35 V	Enables high-voltage headroom for dynamic peaks in music reproduction without clipping - supports 2×30 W output into 8 Ω.
Integrated thermal overload protection	Junction shutdown at 145 °C prevents permanent failure during sustained overload or inadequate heatsinking - self-recovering after cooldown.
Pin-to-pin compatibility	Direct replacement for TDA7265, TDA7269A, and TDA7292 - allows reuse of existing PCB layouts and BOMs in legacy designs.
Low standby IQ (8 mA)	Reduces system-level standby power to meet EU ErP Lot 6 and ENERGY STAR requirements for AV receivers and smart TVs.

Applications

Stereo Home Audio Receiver

Flat-Panel TV Audio Amplifier

Use Scenario: Dual-channel amplification for left/right speakers in compact AV receivers with volume-controlled line-level inputs.

IC Role / Device Role / Timing Role: Final power stage delivering 25 W/channel at 1% THD into 8 Ω loads; mute synchronized to microcontroller I/O during channel switching.

Use Value: Eliminates external mute relays and discrete thermal protection circuitry - reduces BOM count and board space by 30% versus discrete solutions.

Use Scenario: Integrated audio output stage in 32–55 inch LCD/LED TVs requiring low-profile heatsinking and EMI-compliant layout.

IC Role / Device Role / Timing Role: Class-AB stereo driver with built-in standby mode triggered by HDMI CEC or IR remote wake-up signals.

Use Value: Achieves <100 mW total system standby power via 8 mA IQ and fast mute activation - meets IEC 62301 Ed.2 Class B requirements.

Desktop Stereo Speaker System

Multi-room Audio Zone Amplifier

Use Scenario: Powered desktop speakers with USB DAC input and analog volume control feeding dual TDA7265B channels.

IC Role / Device Role / Timing Role: Output amplifier with DC-blocking input caps and 4.7 Ω stability resistors; thermal foldback prevents overheating in enclosed cabinets.

Use Value: Delivers full 30 W/channel into 4 Ω loads with proper heatsinking - enables high-SPL near-field listening without external current boosters.

Use Scenario: Distributed audio zone amplifier accepting line-level input from matrix switcher and driving ceiling speakers over 100 ft cable runs.

IC Role / Device Role / Timing Role: High PSRR (75 dB) amplifier rejecting supply noise from shared 24 V DC bus; crosstalk >70 dB preserves stereo separation across zones.

Use Value: Maintains 20 Hz–20 kHz frequency response flatness within ±0.5 dB - ensures consistent tonal balance across multiple rooms.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7292	Higher output power (50 W + 50 W @ THD=10%, 8 Ω), wider supply range (±10 V to ±40 V), but larger thermal footprint (R_{th j-case} = 1.8 °C/W).	Requires larger heatsink and higher-capacity bulk capacitors; suited for active subwoofers or powered monitors.	Select when >30 W/channel is needed and PCB area allows larger thermal pad; not drop-in due to different pin 5 threshold behavior.
LM1875	Single-channel, TO-220 package, no mute/standby; 20 W @ THD=1%, 8 Ω, ±25 V; lower PSRR (60 dB) and no thermal shutdown.	Needs two ICs and external logic for dual-channel mute/standby - increases component count and layout complexity.	Choose only for cost-sensitive, non-standby applications where thermal management is handled externally and channel separation is less critical.

Compared with TDA7265B, TDA7292 offers higher power but demands more thermal margin, while LM1875 lacks integrated control features and requires duplication for stereo - making TDA7265B optimal for space-constrained, feature-complete consumer audio designs.

Availability

TDA7265B is available at Aetrix Electronics and suitable for stereo TV sets, home audio receivers, desktop speaker systems, and multi-zone audio amplifiers requiring stable component supply across production lifecycles.

Supply support for TDA7265B 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, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TDA7265B belongs to ST's audio power amplifier product line, engineered specifically for high-fidelity, low-noise stereo amplification in space-constrained consumer electronics with integrated protection and power management.

FAQ

What is the recommended heatsink thermal resistance for continuous 30 W/channel operation?

A heatsink with R_{th sink-ambient} ≤ 2.5 °C/W is required when ambient temperature reaches 70 °C, calculated using R_{th j-case} = 1.5 °C/W, R_{th case-sink} ≈ 0.5 °C/W (with thermal grease), and P_diss ≈ 22 W per channel at 30 W output. Mounting torque and flatness must comply with Multiwatt11 mechanical specs to avoid thermal derating.

Can the TDA7265B operate from a single 24 V supply?

Yes - the datasheet provides a verified single-supply schematic (Figure 16) using virtual ground at 12 V via resistor divider and 100 µF bypass capacitor. Output power drops to ~15 W + 15 W into 8 Ω due to reduced voltage swing, and THD increases slightly above 1% at full output; mute/standby thresholds scale linearly with V_CC.

How does the mute function differ from standby in terms of power consumption and output state?

In mute mode (pin 5 = +VS − 4 V), output stages remain biased but attenuated by 75 dB - quiescent current stays at ~130 mA. In standby (pin 5 ≥ +VS − 2.5 V), final-stage current generators disable completely, reducing total IQ to 8 mA and forcing outputs to high-impedance - no DC offset or leakage current flows to speakers.

Is the TDA7265B suitable for driving 4 Ω speakers?

Yes - it delivers 40 W + 40 W at THD = 10% into 4 Ω with ±23 V supply, but requires strict adherence to thermal limits: R_{th sink-ambient} ≤ 1.8 °C/W, ≥2000 µF bulk capacitance per rail, and 4.7 Ω stability resistors. Derating to 25 W/channel is recommended for continuous operation to maintain <1% THD and avoid thermal foldback.

TDA7265B Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: Multiwatt-11 (Vertical, Bent and Staggered Leads)

Packaging:: Tube

Product Status:: Active

Type:: Class AB

Output Type:: 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 30W x 2 @ 8Ohm

Voltage - Supply:: ±8V ~ 33V

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

Mounting Type:: Through Hole

Operating Temperature:: -20°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: Multiwatt-11 (Vertical, Bent and Staggered Leads)

TDA7265B FAQ

1.How can I place an order for TDA7265B through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7265B 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 TDA7265B reliable?

The price and inventory of TDA7265B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7265B is usually 5 days.

3.What payment methods are accepted for TDA7265B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7265B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7265B?

TDA7265B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7265B 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 TDA7265B?

For technical support, including TDA7265B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7265B requirements.

6.How does Aetrix verify that TDA7265B is sourced from the original manufacturer or authorized distributors?

All TDA7265B 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 TDA7265B meets industry standards.

7.What is the process for return or replacement of TDA7265B?

All TDA7265B units undergo pre-shipment inspection (PSI). If there is an issue with TDA7265B, 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 TDA7265B part is unused and in its original packaging.

Return procedure for TDA7265B:

1.Submit a request within 90 days.

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

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