TDA7391PD

Overview

The TDA7391PD is a bridge Class-AB audio power amplifier designed for automotive radio applications. It delivers 32 W into a 3.2 Ω load at 14.4 V with 10% THD, or 26 W into a 4 Ω load under the same conditions. Operating on a single supply voltage ranging from 8 V to 18 V, it features internally fixed gain of 30 dB and differential inputs. The device utilizes a Multiwatt-11 through-hole package and includes comprehensive protection mechanisms such as short-circuit, thermal overload, and load dump protection.

Feature Summary

• Bridge Class-AB architecture optimized for high-power car radio outputs
• Internal fixed gain configuration eliminates external bootstrap capacitors and Boucherot cells
• On-board clipping detector enables easy implementation of gain compression systems
• Supports both differential and single-ended input signal modes

Applications

• High-power automotive radio amplifiers
• Car audio boosters
• End-level car radio equipment

Procurement Notes

Verify component authenticity by checking the manufacturer's marking code against official datasheets. Confirm the package type is Multiwatt-11 with a tab connection. Ensure the specific suffix matches the required lead frame and tape/reel or tube packaging specifications for your assembly process. Cross-reference the AEC-Q100 qualification status if automotive reliability standards are mandatory for your design.

Selection Notes

Select this component when a single-channel mono bridge amplifier is required for automotive environments. It is suitable for designs needing high output power without complex external feedback networks due to its internal fixed gain. Consider the thermal management requirements associated with the Multiwatt-11 package when designing the PCB layout for heat dissipation in enclosed vehicle compartments.

Part Context

This part belongs to the TDA7391 series of automotive audio amplifiers. It shares core architectural features with variants like the TDA7391LV but differs in package and specific electrical ratings. The series is characterized by low external component counts and robust protection features tailored for the harsh electrical environment of vehicles, including immunity to load dumps and inductive loads.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.