STMicroelectronics TDA7492MV13TR

Overview

TDA7492MV13TR from STMicroelectronics is a mono BTL Class-D audio amplifier IC delivering 50 W continuous output into 6 Ω (THD = 10%, V_CC = 25 V), operating from a single 10–26 V supply, with four selectable fixed gain settings (21.6–33.6 dB), differential inputs, and integrated thermal/short-circuit protection - deployed in compact home audio systems and docking stations without heatsink.

For engineers reviewing the TDA7492MV13TR datasheet, TDA7492MV13TR pinout, TDA7492MV13TR application, or TDA7492MV13TR equivalent, key selection considerations include BTL output architecture, exposed-pad PowerSSO-36 thermal performance, gain configuration via GAIN0/GAIN1 logic levels, and synchronous clocking support for multi-amplifier systems.

Technical Context

The device implements a self-oscillating Class-D modulator with internal 310 kHz switching frequency (±20 kHz), configurable via ROSC pin or external SYNCLK input. Its differential input stage provides common-mode noise rejection, while dual regulated outputs (VDDPW, VDDS) power analog and digital blocks independently.

Protection logic integrates open-drain DIAG output signaling overcurrent, thermal shutdown (>150 °C), and undervoltage/overvoltage events. Standby and mute are controlled by dedicated digital inputs with defined voltage thresholds (V_INH ≥ 2.3 V, V_INL ≤ 0.8 V) and sub-5 µA quiescent current in standby mode.

Key Specifications

Pinout & Package

Delivered in PowerSSO-36 EPD (exposed pad down) package: 36-pin thermally enhanced surface-mount housing with integrated ground-plane heatsink; exposed pad must be soldered to PCB copper area for optimal thermal resistance (R_{th j-case} = 2 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mono Class-D amplifier applications.

Compared with TAS5707PAP and TPA3116D2, the TDA7492MV13TR uniquely combines analog-differential input flexibility, pin-selectable gain, and heatsink-free 50 W operation in a thermally optimized PowerSSO-36 EPD package - ideal for space-constrained analog-source audio products.

Availability

TDA7492MV13TR is available at Aetrix Electronics and suitable for home audio docking stations, compact soundbars, automotive auxiliary amplifiers, and IoT smart speaker base units requiring stable component supply and long-term production continuity.

Supply support for TDA7492MV13TR 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TDA7492MV belongs to ST's high-efficiency Class-D audio amplifier product line, engineered specifically for compact, heatsink-free audio systems in cost-sensitive and space-constrained consumer electronics.

FAQ

What is the minimum recommended LC filter for 8 Ω loads?

The datasheet specifies a 33 µH inductor and 220 nF capacitor for 8 Ω loads, forming a second-order low-pass filter with cutoff near 60 kHz. This configuration suppresses PWM carrier energy while preserving audio bandwidth up to 20 kHz and meets EN55032 Class B conducted emissions limits.

How does the DIAG pin indicate thermal overload?

When junction temperature exceeds 150 °C, the open-drain DIAG pin pulls low (≤0.4 V) and remains asserted until temperature drops below 140 °C hysteresis threshold. External pull-up resistor (typically 10 kΩ to 3.3 V) is required to generate a logic-compatible fault signal for host monitoring.

Can GAIN0 and GAIN1 be left floating?

No - GAIN0 and GAIN1 must be actively driven high or low (0 V or 3.3 V) to ensure deterministic gain selection. Floating states may cause undefined gain, increased noise, or erratic behavior. Internal weak pull-downs are not guaranteed; external biasing via MCU GPIO or resistors is mandatory.

Is external clock synchronization mandatory for single-device operation?

No - internal oscillator mode is default and fully functional for standalone use. SYNCLK is optional and only required when synchronizing multiple TDA7492MV devices to avoid beat frequencies and reduce EMI coupling; in master mode, ROSC sets frequency (310 kHz typ.), and SYNCLK is unused.