STMicroelectronics TDA7492P13TR

Overview

TDA7492P13TR from STMicroelectronics is a dual-channel Class-D audio amplifier in PowerSSO-36 EPD package, delivering 25 W + 25 W continuous output into 8 Ω at THD = 10%, V_CC = 20 V, with 90% efficiency and four selectable fixed gain settings (21.6–33.6 dB). It features differential inputs, standby/mute control, thermal/short-circuit protection, and external clock synchronization - designed for LCD TV and monitor audio subsystems.

For engineers reviewing the TDA7492P13TR datasheet, TDA7492P13TR pinout, TDA7492P13TR application, or TDA7492P13TR equivalent, key selection considerations include single-supply operation (8–26 V), exposed-pad-down thermal performance, BTL output architecture, gain configuration via GAIN0/GAIN1 pins, and diagnostic output (DIAG) for fault reporting.

Technical Context

The TDA7492P13TR integrates two identical BTL Class-D amplifier channels with internal PWM modulation driven by a 290–330 kHz oscillator (adjustable via ROSC pin or external SYNCLK). Each channel accepts fully differential analog inputs (INPA/INNA, INPB/INNB) to suppress common-mode noise, and employs independent power stage grounds (PGNDA/PGNDB) and supply rails (PVCCA/PVCCB).

Protection logic includes overcurrent detection (4.2 A threshold), thermal shutdown at 150 °C, undervoltage lockout (<7 V), and overvoltage cutoff (>29 V). The DIAG pin provides open-drain status signaling for faults, while SVR and VREF support supply rejection and bias reference stability across temperature and load conditions.

Key Specifications

Pinout & Package

Package: PowerSSO-36 EPD (exposed pad down), thermally enhanced surface-mount package with integrated ground plane connection via exposed copper pad - enables direct PCB thermal coupling without mechanical heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TAS5756M and TPA3116D2, the TDA7492P13TR offers superior noise immunity via differential inputs and simpler thermal management due to EPD packaging, making it optimal for space-limited, noise-prone display applications where analog signal integrity and passive cooling are mandatory.

Availability

TDA7492P13TR is available at Aetrix Electronics and suitable for LCD television audio subsystems, computer monitor sound systems, digital signage media players, and home theater-in-a-box (HTIB) modules requiring stable component supply, long-term manufacturability, and ECOPACK® environmental compliance.

Supply support for TDA7492P13TR 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 automotive, industrial, and consumer markets.

The TDA7492P13TR belongs to ST's TDA audio amplifier product line, engineered specifically for high-efficiency, low-EMI stereo audio in flat-panel displays - emphasizing thermal robustness, differential noise rejection, and simplified system integration.

FAQ

What is the minimum recommended LC filter for an 8 Ω load?

The datasheet specifies a 33 µH inductor and 220 nF capacitor per channel for 8 Ω loads (Table on page 17). This filter suppresses PWM carrier energy above 300 kHz while preserving audio bandwidth up to 20 kHz. Using smaller values risks EMI emissions exceeding CISPR-22 Class B limits; larger values may cause phase shift and instability.

Can TDA7492P13TR operate from a 12 V supply?

Yes - it supports 8–26 V single supply. At V_CC = 12 V, output power drops to 9.5 W + 9.5 W @ THD = 10% into 8 Ω (Table 5). Efficiency remains >80%, and all protections (UVLO, thermal, overcurrent) remain fully functional. No circuit modification is needed.

How does the DIAG pin indicate thermal overload?

Per Figure 27, DIAG pulls low during thermal shutdown (T_j ≥ 150 °C) and remains low until junction temperature falls below ~135 °C. It stays high-impedance during normal operation and other faults (e.g., overcurrent causes brief low pulse). An external pull-up resistor (e.g., 10 kΩ to 3.3 V) is required for proper logic-level interpretation.

Is the exposed pad electrically connected to ground?

Yes - the exposed pad (EP) is internally connected to PGND and must be soldered to a large PCB ground plane for both electrical reference and thermal conduction. Per Figure 28 and Table 9, the pad dimensions are 12.0 mm × 12.0 mm, and thermal performance assumes ≥9 cm² copper area with ≥6 thermal vias (FR4 board).