E-TDA7391PDTR - 2x40W Dual BTL Audio Amplifier | STMicroelectronics
MPN: E-TDA7391PDTR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for E-TDA7391PDTR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
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TDA7391
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E-TDA7391PDTR Maximum Ratings & Electrical Characteristics
| Output Power | 2x40W at 10% THD, 4 ohm, 14.4V |
| Supply Voltage Range | 8V to 18V |
| Quiescent Current | 120mA |
| Load Impedance | 4 ohm |
| Total Harmonic Distortion (THD) | 10% at max output power |
| Output Configuration | Dual BTL (Bridge-Tied Load) |
| Amplifier Class | Class AB |
| Standby Function | Yes |
| Mute Function | Yes |
| Protection Features | Short-circuit, over-temperature, load dump |
| Package | PowerSO-20 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
E-TDA7391PDTR Pin Configuration
| Pin 1 | OUT1+ β Positive output for channel 1 |
| Pin 2 | OUT1- β Negative output for channel 1 |
| Pin 3 | GND β Ground |
| Pin 4 | GND β Ground |
| Pin 5 | IN1 β Input for channel 1 |
| Pin 6 | SVR β Supply voltage ripple rejection |
| Pin 7 | MUTE β Mute control input |
| Pin 8 | STBY β Standby control input |
| Pin 9 | IN2 β Input for channel 2 |
| Pin 10 | GND β Ground |
| Pin 11 | GND β Ground |
| Pin 12 | OUT2- β Negative output for channel 2 |
| Pin 13 | OUT2+ β Positive output for channel 2 |
| Pin 14 | VS β Supply voltage |
| Pin 15 | VS β Supply voltage |
| Pin 16 | GND β Ground |
| Pin 17 | GND β Ground |
| Pin 18 | GND β Ground |
| Pin 19 | GND β Ground |
| Pin 20 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
E-TDA7391PDTR is suitable for 6 applications: Car Radio Head Units, Multimedia Systems, Aftermarket Audio Amplifiers, Home Theater Systems, Portable PA Systems, Automotive Subwoofer Amplifiers.
Car Radio Head Units
The E-TDA7391PDTR is ideal for car radio head units, providing 2x40W output to drive door speakers directly. Its wide supply voltage range (8V-18V) accommodates automotive battery fluctuations, and the standby/mute functions enable efficient power management. The built-in protection circuits ensure reliability against short circuits and thermal overload, making it a robust choice for in-dash audio systems.
Recommended
Multimedia Systems
In multimedia systems, the E-TDA7391PDTR delivers high-fidelity audio with low distortion, enhancing the listening experience for movies and music. Its compact PowerSO-20 package allows for space-efficient PCB designs, while the pop-free turn-on/off sequence prevents audible clicks. The amplifier's high output power supports subwoofer and mid-range speaker configurations, making it a versatile choice for aftermarket multimedia upgrades.
Recommended
Aftermarket Audio Amplifiers
For aftermarket audio amplifiers, the E-TDA7391PDTR provides a cost-effective solution to boost audio power in vehicles. Its dual BTL configuration eliminates the need for output coupling capacitors, simplifying design and reducing component count. The device's thermal protection ensures safe operation even under continuous high-power output, making it suitable for driving aftermarket speakers and subwoofers.
Recommended
Home Theater Systems
The E-TDA7391PDTR can be used in compact home theater systems to drive satellite speakers or subwoofers. Its high output power and low THD ensure clear, dynamic audio reproduction. The device's standby function reduces power consumption when not in use, aligning with energy-efficient design goals. The PowerSO-20 package with exposed pad allows for effective heat sinking, enabling reliable operation in enclosed consumer electronics.
Recommended
Portable PA Systems
In portable PA systems, the E-TDA7391PDTR offers a compact, high-power amplification solution. Its wide supply voltage range allows operation from various battery configurations, and the low quiescent current extends battery life. The device's robust protection features prevent damage from speaker shorts or overheating, ensuring dependable performance in mobile sound reinforcement applications.
Recommended
Automotive Subwoofer Amplifiers
The E-TDA7391PDTR is well-suited for automotive subwoofer amplifiers, delivering 2x40W to drive subwoofers with deep bass response. Its BTL configuration maximizes power output from a 14.4V supply, and the thermal protection ensures reliable operation during extended bass-heavy playback. The device's mute function allows for easy integration with head unit control signals, providing a seamless user experience.
Recommended
Recommended Products Summary
Engineering reference data for E-TDA7391PDTR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA7391PD | TDA7391PDTR | TDA7391 |
|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Output Power | 2x40W at 10% THD, 4 ohm, 14.4V | 2x40W at 10% THD, 4 ohm, 14.4V | 2x40W at 10% THD, 4 ohm, 14.4V | 2x40W at 10% THD, 4 ohm, 14.4V |
| Supply Voltage Range | 8V to 18V | 8V to 18V | 8V to 18V | 8V to 18V |
| Quiescent Current | 120mA | 120mA | 120mA | 120mA |
| Standby Function | Yes | Yes | Yes | Yes |
| Mute Function | Yes | Yes | Yes | Yes |
| Protection Features | Short-circuit, over-temperature, load dump | Short-circuit, over-temperature, load dump | Short-circuit, over-temperature, load dump | Short-circuit, over-temperature, load dump |
Key Differentiators
- High output power of 2x40W into 4 ohms (vs TDA7391PD)
- Wide supply voltage range of 8V to 18V (vs TDA7391PD)
- Integrated protection features (vs TDA7391PD)
Design Notes
Ensure adequate power supply decoupling with a 1000uF electrolytic capacitor and a 100nF ceramic capacitor placed close to the VS pins. This minimizes voltage ripple and ensures stable operation under high output power conditions, as recommended in the ST TDA7391 datasheet.
The PowerSO-20 package's exposed pad must be soldered to a large copper area on the PCB to dissipate heat effectively. For continuous operation at high power, consider adding thermal vias to a bottom-layer copper plane. This is essential to prevent thermal shutdown, as per ST's thermal guidelines.
Control the standby and mute pins with a microcontroller or an RC network to ensure a pop-free power-up sequence. Avoid floating these pins, as they may cause unpredictable behavior. Additionally, ensure the input signals are properly biased to prevent DC offset, which could damage speakers, as noted in the ST application notes.
Compliance Information
RoHS compliance is assumed based on STMicroelectronics standard practice, but not explicitly stated in the provided data. Other compliance details are unknown.
