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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TDA7492

Name: TDA7492
Brand: STMicroelectronics
SKU: TDA7492
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7492

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 36-PowerFSOP (0.295", 7.50mm Width)

Datasheet:: TDA7492.pdf

Description:: IC AMP D STEREO 50W POWERSSO36

Quantity:: RFQ Add To RFQ list

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Inventory:4,688

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Product details

Overview

TDA7492 from STMicroelectronics is a dual-channel Class-D audio amplifier in PowerSSO-36 EPU package, delivering 50 W + 50 W continuous output into 6 Ω at 10% THD with 25 V supply. It features differential inputs, four fixed gain settings (21.6–33.6 dB), standby/mute control, and thermal/short-circuit protection - deployed in LCD TV and monitor audio subsystems.

For engineers reviewing the TDA7492 datasheet, TDA7492 pinout, TDA7492 application, or TDA7492 equivalent, key selection considerations include single-supply operation (8–26 V), 90% efficiency, exposed-pad thermal management, gain configuration via GAIN0/GAIN1, and external clock synchronization capability.

Technical Context

The TDA7492 integrates two identical BTL Class-D channels with independent power stages, each driven by a 310 kHz internal oscillator (adjustable via ROSC) or synchronized to an external clock on SYNCLK. Its signal path uses fully differential analog inputs with 60 kΩ input resistance and 25 μV input noise (22 Hz–22 kHz).

Protection logic includes overcurrent detection (6 A threshold), thermal shutdown at 150 °C, undervoltage lockout (7 V), and overvoltage protection (29 V). Diagnostic output (DIAG) provides open-drain fault signaling for short-circuit, thermal, or UV/OV events.

Key Specifications

Parameter	Value and Actual Design Meaning
Output power	50 W + 50 W @ 6 Ω, THD = 10%, VCC = 25 V - enables full-range stereo audio in space-constrained TV backlights
Supply voltage range	8–26 V single supply - supports wide-input industrial and consumer DC rails without auxiliary regulators
Efficiency	90% @ 40 W + 40 W - reduces heatsink size and eliminates active cooling in sealed enclosures
Gain settings	21.6 / 27.6 / 31.1 / 33.6 dB (via GAIN0/GAIN1) - matches varied line-level or DAC output amplitudes without external attenuation
THD+N	0.1–0.4% @ 1 W, 1 kHz - meets broadcast-grade audio fidelity requirements for mid-tier displays
Switching frequency	290–330 kHz (internal) or 250–400 kHz (external sync) - avoids audible switching noise and simplifies EMI filter design
Crosstalk	>50 dB @ 1 kHz - ensures channel separation critical for stereo imaging in compact PCB layouts

Pinout & Package

Package: PowerSSO-36 EPU (Exposed Pad Up), thermally enhanced surface-mount housing with integrated heatsink pad tied to PGND.

Pin/Terminal	Circuit Role	Design Meaning
OUTPA/OUTPB	Positive PWM output (left/right)	Drives high-side of BTL speaker load; requires LC low-pass filtering before speaker connection
OUTNA/OUTNB	Negative PWM output (left/right)	Drives low-side of BTL load; complementary to OUTPA/OUTPB for differential drive
PGNDA/PGNDB/PGND	Power stage ground	Separate high-current return paths minimize ground bounce between channels
VDDPW/VDDS/SVCC	On-chip regulator outputs	VDDPW (3.3 V for power stage), VDDS (3.3 V for signal blocks), SVCC (signal supply) - reduce external LDO count
STBY/MUTE	Digital control inputs	Active-high logic: STBY disables all circuitry (2.5 μA quiescent); MUTE silences outputs without disrupting bias
GAIN0/GAIN1	Gain configuration pins	Two-pin binary encoding selects one of four closed-loop gains - no external resistors needed
DIAG	Open-drain diagnostic output	Pulls low during thermal overload, overcurrent, UVLO, or OV - enables system-level fault logging
EP	Exposed thermal pad	Must be soldered to large copper pour connected to PGND - primary thermal path (R_{th j-case} = 2 °C/W)

Key Features

Feature	Design Value
Differential input architecture	60 kΩ input resistance + 25 μV noise floor - rejects common-mode interference from digital video circuits in TVs
Externally synchronizable clock	SYNCLK pin accepts or generates 500 kHz clock - eliminates beat tones when multiple TDA7492s drive adjacent zones
Integrated protection suite	Auto-recovery thermal shutdown, cycle-by-cycle overcurrent limit, UV/OV lockout - prevents field failures without external monitoring
ECOPACK® packaging	Lead-free, halogen-free PowerSSO-36 EPU - complies with RoHS and China RoHS without derating thermal performance
Wide supply tolerance	Operates down to 8 V - sustains audio during brownout conditions in 12 V automotive display systems

Applications

LCD Television Audio

Monitor Soundbar Integration

Use Scenario: Integrated stereo amplification for 24–55 inch LCD TVs with slim mechanical profiles.

IC Role / Device Role / Timing Role: Dual BTL Class-D driver handling baseband audio from HDMI/SPDIF receivers; synchronized via internal oscillator.

Use Value: 90% efficiency enables passive heatsinking, reducing bill-of-materials cost and enabling ultra-thin chassis designs.

Use Scenario: Compact soundbar module embedded behind monitor bezels with limited airflow.

IC Role / Device Role / Timing Role: Primary audio power stage accepting line-level differential inputs from DAC; gain set to 27.6 dB for optimal SNR.

Use Value: Exposed-pad thermal design allows direct mounting to metal chassis, eliminating discrete heatsinks and saving 12 mm board height.

Set-Top Box Audio Output

Digital Signage Media Player

Use Scenario: Audio boost for IPTV/OTT set-top boxes requiring louder playback without external amplifiers.

IC Role / Device Role / Timing Role: Final-stage amplifier receiving unbalanced-to-differential converted signal; muted during channel change via MUTE pin.

Use Value: Standby current of 2.5 μA extends battery backup runtime in hybrid STB designs with real-time clock retention.

Use Scenario: Public-display media players driving dual 8 Ω speakers in kiosks or retail signage.

IC Role / Device Role / Timing Role: High-reliability audio output stage with DIAG-driven watchdog reset on thermal fault.

Use Value: Overvoltage protection (29 V) withstands 24 V supply transients in industrial 24 VDC environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TAS5756M	Higher integration: integrated DSP, I²S interface, and 32-bit processing; 40 W + 40 W @ 8 Ω; 92% efficiency	Requires I²S audio source and firmware configuration; suited for smart TV platforms needing EQ and volume leveling	Select when programmable audio processing and digital input support outweigh cost and layout simplicity
TPA3116D2	Lower cost; 30 W + 30 W @ 8 Ω; 90% efficiency; no differential inputs; requires external gain-setting resistors	Lacks differential noise rejection and integrated regulators - needs additional LDOs and careful layout for EMI control	Select for cost-sensitive, non-TV applications where common-mode noise is minimal and board area is less constrained

Compared with TAS5756M and TPA3116D2, the TDA7492 uniquely balances analog simplicity (no DSP or I²S dependency), differential noise immunity, and self-contained power regulation - making it optimal for legacy video processor interfaces and thermally tight TV chassis.

Availability

TDA7492 is available at Aetrix Electronics and suitable for LCD television manufacturing, monitor audio subsystems, and digital signage media players requiring stable component supply across multi-year production cycles.

Supply support for TDA7492 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 microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The TDA7492 belongs to ST's high-efficiency audio power amplifier product line, engineered specifically for space- and thermal-constrained flat-panel display audio systems with minimal external component count.

FAQ

What LC filter values are recommended for 8 Ω speakers?

For 8 Ω loads, ST specifies a 33 μH inductor and 220 nF capacitor per channel, placed between each PWM output pair (OUTPA/OUTNA and OUTPB/OUTNB) and the speaker. This filter suppresses 310 kHz switching energy while preserving audio bandwidth up to 20 kHz with ±0.5 dB flatness. Layout must minimize loop area and use ground plane under filter components.

How does the TDA7492 handle thermal overload?

When junction temperature reaches 150 °C, the TDA7492 enters thermal shutdown: all PWM outputs disable, STBY remains active, and DIAG pin pulls low. Recovery occurs automatically once T_j drops below 140 °C. The PowerSSO-36 EPU package achieves R_{th j-case} = 2 °C/W when the exposed pad is soldered to ≥4 cm² of 2-oz copper tied to PGND.

Can the TDA7492 operate from a 12 V supply?

Yes - the TDA7492 supports 8–26 V single supply. At 12 V, it delivers 15 W + 15 W into 8 Ω at 10% THD. Quiescent current remains 26–35 mA, and efficiency stays above 80%. For 12 V operation, ensure the LC filter inductors are rated for ≥10 A saturation current to avoid core saturation at peak output.

What is the purpose of the VREF pin?

VREF outputs half of VDDS (≈1.65 V) and serves as the common-mode reference for the differential input amplifiers (INPA/INNA and INPB/INNB). It must be decoupled with a 100 nF ceramic capacitor to SGND. This rail eliminates need for external bias networks and ensures optimal CMRR across temperature and supply variations.

TDA7492 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerFSOP (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Class D

Output Type:: 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 50W x 2 @ 6Ohm

Voltage - Supply:: 8V ~ 26V

Features:: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby

Mounting Type:: Surface Mount

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: PowerSSO-36 EPU

TDA7492 FAQ

1.How can I place an order for TDA7492 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7492 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TDA7492 reliable?

The price and inventory of TDA7492 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7492 is usually 5 days.

3.What payment methods are accepted for TDA7492?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7492 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7492?

TDA7492 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7492 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TDA7492?

For technical support, including TDA7492 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7492 requirements.

6.How does Aetrix verify that TDA7492 is sourced from the original manufacturer or authorized distributors?

All TDA7492 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA7492 meets industry standards.

7.What is the process for return or replacement of TDA7492?

All TDA7492 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7492, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TDA7492 part is unused and in its original packaging.

Return procedure for TDA7492:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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