TDA7388 Pinout, Equivalent, Application, Datasheet

The TDA7388 is a high-power Quad Bridge Audio Amplifier IC commonly used in automotive head units and multi-channel audio systems. It delivers four high-efficiency BTL outputs with excellent sound quality and low distortion. Before using the IC in any car audio project, understanding the TDA7388 pinout and internal configuration is essential for proper system integration.

Introduction

The TDA7388 is a Class-AB quad BTL amplifier designed primarily for automotive audio applications. Operating from a single supply up to 28V, it provides four independent high-power channels with built-in protections and superior output performance. Its high current capability, cross-talk isolation, and low noise make it ideal for 4-speaker car audio systems and aftermarket automotive amplifier boards.

Pin Configuration / Pinout of TDA7388 Power Amplifier IC

Understanding the TDA7388 Pinout Configuration

The TDA7388 typically comes in a Flexiwatt-25 package.

Note: DATASHEET DOWNLOAD button is provided end of this article.

TDA7388 Key Features

• Quad BTL high-power amplifier channels
• Excellent signal-to-noise performance
• Low total harmonic distortion
• Built-in Mute and Standby functions
• Thermal shutdown and short-circuit protection
• Designed for automotive audio head units
• High output current capability
• Superior channel separation and low noise

TDA7388 Specifications/Characteristics

• Supply Voltage (Vs): 18V to 28V
• Total Power Dissipation (Ptot): 80W
• Storage Temperature (Tstg): –55°C to +150°C
• Junction Temperature (TJ): Up to +150°C
• Output Channels: 4 (quad BTL)
• Output Power: ~22W–35W per channel (depending on supply & load)
• Amplifier Class: AB
• Package Type: Flexiwatt-25
• Control Pins: MUTE, ST-BY
• Protections: Thermal shutdown, short-circuit, load dump, ESD

Key Applications of TDA7388 Power Amplifier IC

• Automotive head-unit amplifiers
• 4-channel car speaker systems
• Aftermarket car audio amplifiers
• Multi-channel home audio systems
• Portable 4-speaker amplifier boards
• High-power DIY audio amplifier projects

TDA7388 Equivalent ICs / Alternatives

(Verify pin compatibility before using substitutions)

• TDA7560
• TDA7850
• TDA7386
• TDA7563A
• TDA1554Q (lower-power alternative)
• STA540 (quad amplifier alternative)

More Circuit Layouts

Working Principle of TDA7388

The TDA7388 operates using four independent BTL amplifier stages capable of delivering high output power without output coupling capacitors. Each channel drives a speaker load using two out-of-phase amplifier outputs, doubling the voltage swing for increased power efficiency. The IC uses internal biasing, noise suppression, and stable AB-class amplification to deliver clean audio. Mute and Standby functions help reduce power consumption and prevent switch-on pops or noise.

Frequently Asked Questions (FAQ)

Q1: What is the typical output power of the TDA7388?
Around 22–35 watts per channel depending on supply voltage and speaker impedance.

Q2: Does it require a heat sink?
Yes. A large heat sink is mandatory for safe high-power operation.

Q3: Can it run from a single power supply?
Yes, it is designed for single-supply automotive systems.

Q4: What speaker impedance is recommended?
4Ω speakers are ideal; the IC also supports 2Ω loads in certain designs.

Conclusion

The TDA7388 is a powerful and reliable quad-bridge audio amplifier IC engineered for automotive audio systems. With its high output capability, built-in protection features, and excellent audio quality, it is widely used in car stereos, multi-channel speaker systems, and DIY amplifier boards. Its robust performance and simple implementation make it a dependable choice for high-power 4-channel audio applications.

Datasheet of TDA7388 Power Amplifier IC

Click the following Button below to download the datasheet of TDA7388 :

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