TDA7388 - 4x45W Quad Bridge Car Radio Amplifier | STMicroelectronics
MPN: TDA7388 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
Drop-in alternatives for TDA7388 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:
TDA7386
β Drop-Inπ Reference alternative (not in catalog)
TDA7385
β Drop-Inπ Reference alternative (not in catalog)
TDA7384
β Drop-Inπ Reference alternative (not in catalog)
TDA7388 Maximum Ratings & Electrical Characteristics
| Output Power | 4 x 45 W (4 ohm, 14.4 V, 10% THD) |
| Supply Voltage Range | 8 V to 18 V |
| Quiescent Current | 120 mA |
| Output Offset Voltage | 150 mV |
| Input Impedance | 100 kohm |
| Voltage Gain | 26 dB |
| Total Harmonic Distortion | 0.03% (typical, 1 kHz, 4 ohm, 1 W) |
| Signal-to-Noise Ratio | 90 dBA |
| Standby Current | 100 uA |
| Operating Temperature Range | -40C to +105C |
| Package | Flexiwatt 25 |
| Mounting Type | Through Hole |
| Thermal Resistance (junction-case) | 1.5 C/W |
| RoHS Status | Compliant |
| Number of Channels | 4 |
TDA7388 Pin Configuration
| Pin 1 | OUT1 β Output channel 1 |
| Pin 2 | GND β Ground |
| Pin 3 | OUT2 β Output channel 2 |
| Pin 4 | VS β Power supply |
| Pin 5 | OUT3 β Output channel 3 |
| Pin 6 | GND β Ground |
| Pin 7 | OUT4 β Output channel 4 |
| Pin 8 | SVR β Supply voltage ripple rejection |
| Pin 9 | IN1 β Input channel 1 |
| Pin 10 | IN2 β Input channel 2 |
| Pin 11 | IN3 β Input channel 3 |
| Pin 12 | IN4 β Input channel 4 |
| Pin 13 | MUTE β Mute control |
| Pin 14 | STBY β Standby control |
| Pin 15 | 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
TDA7388 is suitable for 6 applications: Car Radio Head Units, Aftermarket Car Audio Amplifiers, Marine Audio Systems, Home Audio Systems, Public Address Systems, Guitar Amplifiers.
Car Radio Head Units
The TDA7388 is widely used in car radio head units to drive four speakers with high output power. Its 4 x 45 W output into 4 ohm loads provides ample volume and headroom for automotive audio. The wide supply voltage range (8-18 V) ensures compatibility with vehicle electrical systems, which can vary from 12 V nominal to higher levels during alternator charging. The low quiescent current (120 mA) and standby mode (100 uA) help conserve battery power when the radio is off. The Flexiwatt 25 package with exposed metal tab allows efficient heat dissipation, essential for continuous operation in confined dashboard spaces. The built-in short-circuit and thermal protection ensure reliable operation in harsh automotive environments. The mute function prevents audible pops during power-up and power-down, enhancing user experience. Overall, the TDA7388 provides a cost-effective, reliable solution for head unit manufacturers seeking high-quality audio output.
Recommended
Aftermarket Car Audio Amplifiers
The TDA7388 is a popular choice for aftermarket car audio amplifiers, offering high output power and low distortion in a compact package. Its 4 x 45 W output can drive aftermarket speakers with improved clarity and volume compared to factory head units. The low THD (0.03%) ensures clean sound reproduction, while the high SNR (90 dBA) minimizes background noise. The amplifier's differential input stage provides good noise rejection, making it suitable for use with aftermarket head units that may have higher output impedance. The standby and mute functions allow for easy integration with external control systems, such as remote turn-on leads. The thermal protection ensures safe operation even when driving low-impedance loads or in poorly ventilated installations. The Flexiwatt 25 package's low thermal resistance (1.5 C/W) allows for effective heatsinking, enabling continuous high-power operation. This makes the TDA7388 an ideal choice for DIY and professional aftermarket audio installations.
Recommended
Marine Audio Systems
The TDA7388 is suitable for marine audio systems due to its wide operating temperature range (-40C to +105C) and robust protection features. Marine environments expose electronics to high humidity, temperature fluctuations, and vibration. The TDA7388's thermal protection prevents damage from overheating, while its short-circuit protection guards against wiring faults. The low quiescent current is beneficial for battery-powered boats, and the standby mode further reduces power consumption when the system is not in use. The high output power (4 x 45 W) ensures clear audio over engine noise, and the low distortion maintains sound quality at high volumes. The Flexiwatt 25 package's exposed metal tab can be bolted to a heatsink or the boat's metal structure for effective heat dissipation. The mute function prevents pops when the system is turned on or off, which is important in quiet marine settings. Overall, the TDA7388 provides a reliable and high-performance solution for marine audio applications.
Recommended
Home Audio Systems
Although designed for automotive use, the TDA7388 can be used in home audio systems with a suitable power supply. Its high output power (4 x 45 W) can drive bookshelf speakers or small floor-standing speakers in a multi-room audio setup. The low THD (0.03%) and high SNR (90 dBA) ensure high-fidelity sound reproduction. The wide supply voltage range (8-18 V) allows flexibility in power supply design, and the standby and mute functions can be controlled by a microcontroller for automated power management. The thermal protection ensures safe operation even when driving low-impedance speakers or in enclosed cabinets. The Flexiwatt 25 package's low thermal resistance allows for compact heatsink designs, making it suitable for DIY amplifier projects. The differential input stage provides good noise rejection, reducing hum and interference from household power lines. This makes the TDA7388 a versatile and cost-effective option for home audio enthusiasts.
Recommended
Public Address Systems
The TDA7388 can be used in small public address (PA) systems for announcements and background music in commercial settings. Its 4 x 45 W output can drive multiple ceiling speakers or horn speakers, providing clear audio coverage. The low distortion and high SNR ensure intelligible speech and music reproduction. The wide supply voltage range allows operation from various power sources, including battery backup systems. The standby and mute functions enable remote control of the amplifier, and the thermal protection ensures reliable operation in continuous-duty applications. The Flexiwatt 25 package's low thermal resistance allows for efficient heatsinking, enabling sustained high-power output. The differential input stage provides good noise rejection, reducing interference from lighting and other electrical equipment. This makes the TDA7388 a practical choice for small PA systems in schools, offices, and retail stores.
Recommended
Guitar Amplifiers
The TDA7388 can be used in guitar amplifiers to provide clean, high-power output for practice or small gigs. Its 4 x 45 W output can drive a 4 ohm speaker cabinet, providing ample volume for rehearsals. The low THD (0.03%) ensures clean sound at moderate volumes, while the high SNR (90 dBA) minimizes background hiss. The wide supply voltage range allows operation from a variety of power supplies, including battery packs for portable use. The standby and mute functions can be used to implement a standby switch, reducing power consumption when not playing. The thermal protection ensures safe operation even when driving low-impedance loads. The Flexiwatt 25 package's low thermal resistance allows for compact heatsink designs, making it suitable for portable amplifier enclosures. The differential input stage provides good noise rejection, reducing hum from guitar pickups. This makes the TDA7388 a versatile and cost-effective option for DIY guitar amplifier builders.
Recommended
Recommended Products Summary
Engineering reference data for TDA7388 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA7386 | TDA7385 | TDA7384 |
|---|---|---|---|---|
| Package | Flexiwatt 25 | Flexiwatt 25 - same | Flexiwatt 25 - same | Flexiwatt 25 - same |
| Output Power (4 ohm, 14.4V, 10% THD) | 4 x 45 W | 4 x 41 W | 4 x 40 W | 4 x 35 W |
| Supply Voltage Range | 8 V to 18 V | 8 V to 18 V | 8 V to 18 V | 8 V to 18 V |
| Quiescent Current | 120 mA | 120 mA | 120 mA | 120 mA |
| Total Harmonic Distortion (1 kHz, 1 W) | 0.03% | 0.03% | 0.03% | 0.03% |
| Signal-to-Noise Ratio | 90 dBA | 90 dBA | 90 dBA | 90 dBA |
| Standby Current | 100 uA | 100 uA | 100 uA | 100 uA |
| Operating Temperature Range | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
Key Differentiators
- Highest output power in the TDA738x family (vs TDA7386)
- Wide supply voltage range (vs TDA7384)
- Low quiescent current (vs TDA7385)
Design Notes
At 4 x 45 W output, the TDA7388 can dissipate significant heat. With a thermal resistance of 1.5 C/W (junction-to-case), a heatsink with a thermal resistance of 2 C/W or lower is recommended to keep the junction temperature below 150C. Ensure the exposed metal tab is properly soldered to a large copper area or bolted to a heatsink with thermal compound.
Place the power supply decoupling capacitors (100 uF electrolytic and 100 nF ceramic) as close as possible to the VS pin. Use a star ground topology to minimize ground loops and reduce noise. Keep the input signal traces away from the output traces to prevent crosstalk and oscillation.
Do not operate the TDA7388 without a load on any channel, as this can cause output stage damage. Ensure the mute and standby pins are properly controlled during power-up and power-down to avoid pops. Use input coupling capacitors (1 uF) to block DC offset from the source, and avoid exceeding the maximum supply voltage of 18 V.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 not applicable as this is not a qualified automotive IC, but designed for automotive use.
