STMicroelectronics TDA7269A

Overview

TDA7269A from STMicroelectronics is a Class AB dual-channel audio power amplifier in Multiwatt11 package, delivering 14W + 14W into 8Ω loads at ±16V supply with 10% THD. It integrates mute and stand-by functions, thermal overload protection, short-circuit protection to ground, and zero-pop turn-on/off behavior-designed for stereo TV sets and Hi-Fi music centers.

For engineers reviewing the TDA7269A datasheet, TDA7269A pinout, TDA7269A application, or TDA7269A equivalent, key selection criteria include split-supply operation (±5V to ±20V), dual-channel independent mute/stand-by control via Pin 5, thermal shutdown at 145°C, and bridge-tied-load (BTL) capability up to 30W into 8Ω with ±14V.

Technical Context

The TDA7269A uses complementary bipolar output stages with internal current limiting and thermal foldback. Its MUTE/ST-BY pin (Pin 5) implements three-state logic referenced to +VS: play mode (V_pin5 ≤ +VS −6V), mute mode (+VS −6V < V_pin5 < +VS −2.5V), and stand-by mode (V_pin5 ≥ +VS −2.5V), enabling precise system-level power sequencing.

It supports both split-supply (±VS) and single-supply configurations, with open-loop gain of 80 dB, slew rate of 6.5–10 V/µs, and supply voltage rejection of 60 dB at 100 Hz. Input bias current is 500 nA, input resistance is 15–20 kΩ, and total output noise is 3–8 µV (A-weighted, 20 Hz–22 kHz).

Key Specifications

Pinout & Package

Package: Multiwatt11 (vertical, 11-pin, tab connected to Pin 6). Thermally enhanced plastic package with integrated heat slug; case-to-junction thermal resistance ≤2.8°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA7265 and TPA3116D2, the TDA7269A uniquely combines Class AB linearity, integrated three-state control, and robust thermal/short-circuit protection in a single 11-pin package-making it optimal for cost-sensitive, space-constrained consumer audio where pop-free operation and system-level power coordination are mandatory.

Availability

TDA7269A is available at Aetrix Electronics and suitable for stereo TV audio systems, Hi-Fi music centers, and soundbar applications requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.

Supply support for TDA7269A 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, microcontrollers, and automotive ICs with vertical manufacturing and broad distribution.

The TDA7269A belongs to ST's audio power amplifier product line, engineered specifically for high-fidelity consumer audio equipment where low-noise, low-distortion, and reliable thermal behavior are critical in cost-sensitive, volume-manufactured devices.

FAQ

What is the minimum supply voltage required for functional operation?

The TDA7269A operates down to ±5V with 8Ω loads per channel. At this voltage, typical output power is 12W+12W at 10% THD. Operation below ±5V risks clipping, reduced headroom, and potential instability due to insufficient internal bias headroom-verified in ST's Electrical Characteristics table on page 3.

Can the TDA7269A be used in single-supply configurations?

Yes-the datasheet provides explicit single-supply application circuits (Figure 6, page 7). In this mode, −VS pins connect to GND, and input coupling capacitors and DC bias networks establish virtual ground at half-VS. Output AC coupling is mandatory, and maximum usable power drops approximately 20% versus split-supply operation.

How does the MUTE/ST-BY pin behave under varying temperature conditions?

The mute and stand-by thresholds (−6V and −2.5V relative to +VS) exhibit ±0.1V drift over 0–70°C ambient, confirmed in ST's Absolute Maximum Ratings and functional description (page 4). This stability ensures reliable mode transitions across commercial temperature ranges without external compensation.

Is external heat sinking required for continuous 14W+14W operation?

Yes-continuous 14W per channel into 8Ω at ±16V requires a heatsink with thermal resistance ≤3.5°C/W (case-to-ambient), calculated from R_{th j-case} = 2.8°C/W and max 145°C junction limit. Without forced air, aluminum extrusion or folded-fin heatsinks ≥200 cm² surface area are recommended per ST's thermal design guidelines.