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

STMicroelectronics E-TDA7396

Name: E-TDA7396
Brand: STMicroelectronics
SKU: E-TDA7396
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: E-TDA7396

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: Multiwatt-11 (Vertical, Bent and Staggered Leads)

Datasheet:: E-TDA7396.pdf

Description:: IC AMP AB MONO 65W 11MULTIWATT

Quantity:: RFQ Add To RFQ list

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Inventory:367

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Product details

Overview

TDA7396 from STMicroelectronics is a Class AB bridge-tied load (BTL) audio power amplifier designed for automotive radio applications, delivering 45W into 2Ω at 14.4V with 10% THD, differential or single-ended input support, fixed 26dB gain, and integrated diagnostic functions including clipping detection, open-load, short-circuit, and thermal shutdown.

For engineers reviewing the TDA7396 datasheet, TDA7396 pinout, TDA7396 application, or TDA7396 equivalent, key selection considerations include its 2Ω load capability, CMOS-compatible standby/mute control, rail-to-rail output swing without bootstrap capacitors, and diagnostics signaling via open-collector CD-DIA pin.

Technical Context

The TDA7396 implements a fully complementary PNP/NPN BTL output stage enabling 65W peak into 2Ω while eliminating external bootstrap and Boucherot components. Its internal thermal protection uses dual-stage response: linear foldback activation at 140°C and absolute shutdown at 160°C, with diagnostics signaled continuously on pin 4.

Input stage supports both differential and single-ended configurations with matched impedance requirements; clipping detection triggers at precisely 0.5% THD, and fault isolation distinguishes transient clipping from persistent faults (e.g., short-to-VS vs. open-load) via timing behavior on the CD-DIA pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	45W RMS @ 2Ω, 14.4V, 1kHz, 10% THD - enables high-fidelity mid-bass driver support in compact car radios
Supply Voltage Range	8–18V DC - compatible with automotive battery transients and regulated 12V systems
Voltage Gain	26dB ±1dB - eliminates need for external gain-setting resistors, reducing BOM count
THD+N	0.06% @ 1W–20W, 2Ω - ensures low distortion across full dynamic range in loudspeaker drive
Input Impedance	60kΩ differential / 55kΩ single-ended - minimizes loading on preamp stages and simplifies interface design
Clipping Threshold	0.5% THD - enables precise gain compression implementation without external sensing circuitry
Thermal Shutdown	160°C junction - provides fail-safe protection under sustained overload or poor heatsinking

Pinout & Package

Package: Multiwatt11 (vertical mount, tab-connected to pin 6, R_{th j-case} = 1.5°C/W), thermally optimized for automotive PCB layouts with direct heatsink contact via exposed metal tab.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 (IN−, IN+)	Differential input pair	High-impedance inputs accepting either balanced signal or single-ended with GND-coupled IN−; require matched external impedances
4 (CD-DIA)	Open-collector diagnostic output	Sinks current during clipping, thermal foldback, short-circuit, or open-load; requires external pull-up to 5–V_S
5, 7 (OUT−, OUT+)	BTL output terminals	Drive speaker differentially; no bootstrap caps needed due to rail-to-rail swing and complementary output stage
6 (TAB)	Thermal pad / GND reference	Internally connected to pin 6 and electrically tied to heatsink; must be soldered to large copper area for thermal management
8 (STANDBY)	CMOS-compatible enable input	Logic-low disables bias supplies (I_SB ≤ 100µA); logic-high enables full operation with automatic mute on transition
10 (SYNC)	Soft-start timing control	Resistor-to-GND sets current charging CM capacitor (pin 11), controlling turn-on ramp time and pop suppression
11 (MUTE)	Mute timing & external control node	Capacitor-to-GND sets mute duration; external transistor circuit enables independent mute override with 0.63–0.69 R_EXT/R_S ratio

Key Features

Feature	Design Value
No external bootstrap capacitors	Rail-to-rail output swing achieved via fully complementary PNP/NPN BTL stage, eliminating capacitor placement and reliability concerns
Integrated diagnostics signaling	Single open-collector pin reports clipping, thermal events, open-load, and all short-circuit modes with distinguishable timing signatures
Automated mute & standby sequencing	Internal timing circuits suppress audible pop during power-up/down and provide CMOS-level standby control with 90dB attenuation
Fixed 26dB gain configuration	Removes gain-setting resistors and associated layout sensitivity, improving production consistency and reducing component count
Thermal foldback + hard shutdown	Gradual power reduction begins at 140°C (LTS), preventing abrupt cutoff; final shutdown at 160°C (ATS) includes soft restart to avoid speaker voltage spikes

Applications

Car Audio Head Unit Amplifier

Aftermarket Stereo Booster

Use Scenario: Integrated 45W BTL amplifier in OEM head unit driving front door woofers and midrange drivers.

IC Role / Device Role / Timing Role: Primary audio power stage with diagnostics feedback to MCU for real-time fault logging and speaker protection.

Use Value: Eliminates discrete protection ICs and external gain resistors, reducing board space by >12% versus legacy designs.

Use Scenario: Compact add-on amplifier module boosting factory head unit output to drive high-sensitivity component speakers.

IC Role / Device Role / Timing Role: Standalone BTL power stage with SYNC pin synchronized to main system power rail for glitch-free multi-device startup.

Use Value: Enables plug-and-play installation with no external compensation or bootstrap components required.

Diagnostic-Enabled Speaker Test System

Thermally Protected Subwoofer Driver

Use Scenario: Production-line test fixture verifying speaker wiring integrity and amplifier functionality before vehicle assembly.

IC Role / Device Role / Timing Role: Diagnostic source feeding CD-DIA signal to test controller to identify open-load, short-to-ground, or clipping during sweep-tone validation.

Use Value: Detects miswiring or defective speakers in <500ms, cutting test time by 3× versus manual continuity checks.

Use Scenario: Sealed enclosure subwoofer amplifier operating at sustained high power with limited airflow.

IC Role / Device Role / Timing Role: Thermally adaptive power stage using LTS foldback to maintain output below thermal trip while preserving bass impact.

Use Value: Delivers consistent 35W RMS into 2Ω without shutdown cycling, unlike fixed-threshold alternatives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar BTL automotive audio amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7388	4×50W quad-channel, lower per-channel PSRR (50dB), no CD-DIA pin	Lacks integrated diagnostics; requires external fault monitoring circuitry	Select when multi-channel integration outweighs diagnostic autonomy
STA559BW	Digital input (I²S), 2×100W, integrated DSP, higher quiescent current (150mA)	Requires digital source interface; not pin-compatible; adds software configuration overhead	Select for advanced EQ, crossover, and protection tuning in premium systems

Compared with TDA7388 and STA559BW, the TDA7396 uniquely balances analog simplicity, diagnostic self-sufficiency, and 2Ω drive capability-making it optimal for cost-sensitive, high-reliability mono/bridge amplifiers where hardware-level fault visibility is mandatory.

Availability

TDA7396 is available at Aetrix Electronics and suitable for automotive infotainment systems, aftermarket audio boosters, and diagnostic-enabled speaker test fixtures requiring stable component supply and long-term lifecycle support.

Supply support for TDA7396 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 devices for automotive, industrial, and consumer markets.

The TDA7396 belongs to ST's automotive-grade audio power amplifier product line, engineered specifically for robust, high-power, diagnostics-capable operation in constrained-space car radio and booster applications.

FAQ

What is the minimum supply voltage required for full 45W output?

The TDA7396 delivers 45W into 2Ω at VS = 14.4V with 10% THD. Its operational supply range starts at 8V, but output power scales with voltage: at 12V it delivers ~32W, and at 8V only ~14W. Full rated power requires ≥13.7V per EIAJ test conditions.

How does the CD-DIA pin differentiate clipping from a short-circuit fault?

The CD-DIA pin sinks current during both events, but timing distinguishes them: clipping causes brief, periodic current pulses synchronized to audio peaks, while short-circuit or open-load faults produce continuous current sink until fault removal. External MCU sampling at ≥10kHz resolves this distinction.

Can the TDA7396 drive a 1Ω load?

No. Absolute maximum ratings specify 2Ω minimum load impedance. Driving 1Ω exceeds safe operating area limits, risks immediate thermal shutdown or device failure due to excessive current (peak >7A) and power dissipation beyond 43W rating.

Is external mute control mandatory, or can the internal mute be used standalone?

Internal mute is fully functional standalone-capacitor C_M on pin 11 sets mute duration automatically during power transitions. External mute via transistor circuit is optional and only needed when independent mute assertion (e.g., MCU-driven silence during Bluetooth pairing) is required beyond power-cycle events.

E-TDA7396 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: Multiwatt-11 (Vertical, Bent and Staggered Leads)

Packaging:: Tube

Product Status:: Active

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 65W x 1 @ 2Ohm

Voltage - Supply:: 8V ~ 18V

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

Mounting Type:: Through Hole

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: -

Supplier Device Package:: 11-Multiwatt

E-TDA7396 FAQ

1.How can I place an order for E-TDA7396 through Aetrix?

Please submit a Request for Quotation (RFQ) for E-TDA7396 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 E-TDA7396 reliable?

The price and inventory of E-TDA7396 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-TDA7396 is usually 5 days.

3.What payment methods are accepted for E-TDA7396?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-TDA7396 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for E-TDA7396?

E-TDA7396 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your E-TDA7396 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 E-TDA7396?

For technical support, including E-TDA7396 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-TDA7396 requirements.

6.How does Aetrix verify that E-TDA7396 is sourced from the original manufacturer or authorized distributors?

All E-TDA7396 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 E-TDA7396 meets industry standards.

7.What is the process for return or replacement of E-TDA7396?

All E-TDA7396 units undergo pre-shipment inspection (PSI). If there is an issue with E-TDA7396, 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 E-TDA7396 part is unused and in its original packaging.

Return procedure for E-TDA7396:

1.Submit a request within 90 days.

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

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