STMicroelectronics TDA7499

Overview

TDA7499 from STMicroelectronics is a Class AB dual-channel audio power amplifier in Multiwatt11V package, delivering 6W+6W into 8Ω at ±14V with <0.03% THD at 1kHz, mute/standby control, and thermal/short-circuit protection-designed for Hi-Fi music centers and stereo TV sets.

For engineers reviewing the TDA7499 datasheet, TDA7499 pinout, TDA7499 application, or TDA7499 equivalent, key selection criteria include split/single-supply operation (±5–±18V / 10–36V), mute/standby threshold referencing +VS, thermal shutdown at 145°C, and 6.5–10 V/µs slew rate for low-distortion audio reproduction.

Technical Context

The TDA7499 integrates two independent Class AB amplifier channels with shared biasing and protection circuitry. 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 pop-free turn-on/off and ultra-low quiescent current (3–6 mA in stand-by).

It supports both split-supply (±5V to ±18V) and single-supply (10V to 36V) configurations. Output stage features internal current limiting (2.5 A max), thermal overload protection (T_j = 145°C), and short-circuit protection to ground-ensuring robust operation in consumer audio systems without external foldback circuitry.

Key Specifications

Pinout & Package

Package: Multiwatt11V (vertical, 11-pin, tab connected to Pin 6). Thermally enhanced through-hole package with integrated heatsink tab for >23 W dissipation at T_amb = 70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA7499, TDA7377 offers greater output power but lacks integrated stand-by control, while LM4863 delivers superior efficiency at lower power levels but introduces EMI filtering complexity and higher THD-making TDA7499 optimal for mid-power, thermally stable, feature-rich consumer audio.

Availability

TDA7499 is available at Aetrix Electronics and suitable for Hi-Fi music centers, stereo television sets, and compact home audio systems requiring stable component supply and long-term design continuity.

Supply support for TDA7499 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.

The TDA7499 belongs to ST's audio power amplifier product line, engineered specifically for cost-sensitive, high-fidelity consumer audio applications where reliability, low-noise performance, and integrated protection are mandatory.

FAQ

What supply configurations does the TDA7499 support?

The TDA7499 supports both split-supply (±5V to ±18V) and single-supply (10V to 36V) operation. In split mode, Pins 2 and 6/11 connect to +VS and −VS respectively; in single mode, Pin 6/11 serves as GND reference while Pin 2 connects to the positive rail. The internal circuitry auto-adapts bias points accordingly.

How does the MUTE/ST-BY pin function with respect to supply rails?

Pin 5 (MUTE/ST-BY) uses absolute voltage thresholds referenced to +VS: play mode when V_pin5 < +VS −6V, mute mode when +VS −6V < V_pin5 < +VS −2.5V, and stand-by mode when V_pin5 > +VS −2.5V. This eliminates need for external level-shifting circuitry when interfacing with microcontroller GPIOs.

What thermal protection behavior occurs during overload?

When junction temperature reaches 145°C, the TDA7499 disables both output stages and enters thermal shutdown. It remains latched off until T_j drops below ~130°C (typical hysteresis), then automatically resumes operation-no external reset or power cycle required.

Can the TDA7499 drive 4Ω loads reliably?

Yes-the TDA7499 delivers 6W+6W into 4Ω at ±8.5V (THD = 10%) and includes internal current limiting (2.5 A) and thermal protection. For continuous 4Ω operation, ensure heatsinking meets R_{th j-amb} ≤ 35°C/W and ambient stays ≤ 70°C per datasheet limits.