STMicroelectronics TDA7263M

Overview

TDA7263M from STMicroelectronics is a Class AB dual-channel audio power amplifier in Multiwatt11 package, delivering 12W + 12W RMS output into 8Ω at VS = 28V with THD = 10%, featuring pop-free mute, thermal shutdown at 145°C, and AC short-circuit protection-designed for stereo TV sets and HI-FI music centers.

For engineers reviewing the TDA7263M datasheet, TDA7263M pinout, TDA7263M application, or TDA7263M equivalent, key selection considerations include its wide supply range (10–30V), 70–100 dB mute attenuation, 40 Hz–80 kHz bandwidth, 45–60 dB supply rejection, and integrated protection architecture for robust consumer audio deployment.

Technical Context

The TDA7263M implements dual independent Class AB amplifier channels with fixed internal gain of 30 dB, driven by high-input-impedance (100–200 kΩ) differential input stages and buffered outputs capable of ±2 A peak current. Its mute function operates via voltage threshold detection (1.0–1.6 V for mute, 4.5 V for play) and reduces quiescent current to 7–10 mA during silence.

Thermal protection uses junction-sensing circuitry that dynamically limits output power above 145°C, while AC short-circuit tolerance enables safe operation during speaker wiring faults without latch-up or device damage-both features are implemented in silicon without external components.

Key Specifications

Pinout & Package

Package: Multiwatt11 (vertical, 11-pin, single-in-line with heat sink tab). Pin numbering follows top-view layout per STMicroelectronics datasheet Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA7263M, TDA7265 offers higher output and ruggedized thermal specs but demands larger heatsinking, while LM4863 targets sub-5V portable use-neither matches the original's 12W+12W/10–30V/mute-integrated profile for mainstream consumer audio.

Availability

TDA7263M is available at Aetrix Electronics and suitable for stereo TV sets, HI-FI music centers, set-top box audio subsystems, and portable docking stations requiring stable component supply and long-lifecycle support.

Supply support for TDA7263M 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 industrial, automotive, and consumer markets.

The TDA7263M belongs to ST's audio power amplifier product line, engineered specifically for cost-sensitive, high-fidelity stereo applications in space-constrained consumer electronics with integrated protection and simplified system integration.

FAQ

What is the minimum recommended supply voltage for reliable operation?

The TDA7263M specifies a minimum supply voltage of 10 V under all operating conditions. Below this, output power drops significantly and distortion increases beyond specification-designers must ensure regulated or well-filtered 10 V+ rails, especially under dynamic load, to maintain 12W/channel performance and avoid clipping.

How does the mute function achieve pop-free operation?

The mute circuit internally controls output stage bias and employs soft-clamping during transition, preventing abrupt voltage steps at the speaker terminals. Combined with external mute timing capacitors (e.g., C3 = 47 µF), it ensures smooth ramp-up/down of output DC offset-verified in ST's application circuit to eliminate audible transients at turn-on and turn-off.

Can the TDA7263M drive 4Ω speakers?

Yes, but with derated output power and mandatory thermal review: maximum continuous output drops to ~8W+8W at VS = 24V due to increased current demand and junction heating. The datasheet confirms safe operation at 4Ω with proper heatsinking (R_{th j-amb} ≤ 10 °C/W) and reduced supply voltage to limit P_tot below 30 W absolute max.

Is the Multiwatt11 package lead-free and RoHS-compliant?

Yes-the TDA7263M was manufactured by STMicroelectronics under RoHS Directive 2002/95/EC, with lead-free terminations and halogen-free molding compound. The device carries the "E" suffix in some ordering variants to denote RoHS compliance; standard TDA7263M parts shipped post-2006 meet full RoHS requirements without exemption.