TDA7376B

Overview

The TDA7376B is a dual bridge Class-AB audio amplifier designed for automotive radio applications. It delivers high output power, rated at 2 x 35 W into 4 Ω (EIAJ standard) and up to 2 x 40 W maximum. The device operates on a single supply voltage ranging from 8 V to 18 V. Key electrical parameters include an internally fixed gain of 26 dB, a differential input configuration, and a total harmonic distortion plus noise of 0.08%. It features rail-to-rail voltage swing without bootstrap capacitors and includes programmable clipping detection.

Feature Summary

• Dual bridge architecture with fully complementary PNP/NPN output stage enabling rail-to-rail voltage swing
• Differential input pairs providing high noise immunity for car radio and booster applications
• Integrated audio mute and standby controls that suppress pop transients and reduce power switch costs
• On-board programmable distortion detector allowing compression facility when the amplifier is overdriven

Applications

• Automotive radio systems
• Car audio boosters
• Dual channel stereo amplification in vehicle infotainment units

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package integrity and pin alignment against the Multiwatt-15 specification. Check for recent Product Change Notifications regarding manufacturing site updates. Ensure compliance with RoHS directives as indicated in official datasheets. Validate part markings against current production batches to avoid obsolete stock.

Selection Notes

Select this component for designs requiring high power density in automotive environments. The internal fixed gain simplifies circuit design by minimizing external components. Differential inputs are suitable for noisy vehicle electrical systems. Consider thermal management requirements due to the power dissipation levels. Verify compatibility with CMOS-compatible mute and standby control signals.

Part Context

The TDA7376B belongs to the TDA7376 series of audio amplifiers from STMicroelectronics. It utilizes a Multiwatt-15 package optimized for heat dissipation in automotive applications. The device represents a newer technology within its family, offering improved efficiency and feature integration compared to earlier iterations. It is specifically engineered to meet the rigorous demands of car radio power amplification.

Replacement Considerations

Public documentation indicates the TDA7376PD as a related variant within the same product line. Both devices share similar power ratings and application targets. Verify pinout compatibility and specific electrical tolerances before substitution. Review official discontinuation notices for availability constraints.