TDA7388

Overview

The TDA7388 is a Class-AB audio power amplifier integrated circuit designed for high-end car radio applications. It features four bridge-tied load (BTL) channels capable of delivering up to 45W per channel into a 4Ω load, or 26W at 14.4V with 10% THD. The device operates within an 8V to 18V supply voltage range and utilizes a Flexiwatt-25 package. Key electrical specifications include a fixed internal gain of 26 dB, a maximum operating temperature of 85°C to 105°C depending on revision, and AEC-Q100 qualification.

Feature Summary

• Fully complementary PNP/NPN output configuration enabling rail-to-rail voltage swing without bootstrap capacitors
• Integrated protection mechanisms including thermal limiting, short-circuit detection, and automute functionality
• Simplified design architecture requiring minimal external components due to fixed internal gain

Applications

• High-end automotive radio systems
• Car audio power amplification
• Four-channel speaker driving in vehicle infotainment units

Procurement Notes

Verify the specific suffix code against the manufacturer's current datasheet to confirm pinout compatibility and thermal performance characteristics. Ensure the selected variant matches the required packaging type and operating temperature range for the target automotive environment. Cross-reference part numbers with official STMicroelectronics documentation to avoid counterfeit components.

Selection Notes

Select this component for designs requiring high output power in a compact form factor with reduced external component count. Consider the Flexiwatt-25 package requirements for adequate heat dissipation. Evaluate the fixed 26 dB gain against system input levels to ensure proper signal handling without additional external compensation networks.

Part Context

The TDA7388 belongs to STMicroelectronics' portfolio of automotive Class-AB audio power amplifiers. It serves as a high-power solution for multi-channel audio systems in vehicles. The device is often compared with variants like the TDA7388A, which offers similar functionality with potential differences in packaging or specific protection features.

Replacement Considerations

The TDA7388A is a related quad bridge car radio amplifier with comparable functionality. Verify pinout compatibility and thermal characteristics before substitution. Other family members may offer different power ratings or diagnostic features.