TDA7850AH

Overview

The TDA7850AH is a Class-AB audio power amplifier utilizing MOSFET technology, designed for high-power car radio applications. It features a fully complementary P-Channel/N-Channel output structure enabling rail-to-rail voltage swing. The device provides four channels with a maximum output power of 85W per channel into a 2-ohm load and 50W into a 4-ohm load. It operates on a single supply voltage ranging from 8V to 18V. Key electrical parameters include a fixed internal gain of 26 dB, an output current capability of 10 A, and a total harmonic distortion plus noise (THD+N) of 0.015%. The component is housed in a 27-Flexiwatt package.

Feature Summary

• Integrates a DC offset detector for enhanced signal integrity
• Features onboard 0.35 A high-side driver reducing external component count
• Includes comprehensive protection mechanisms such as thermal limiting and short-circuit detection

Applications

• High-power car radio systems
• Automotive speaker amplification
• Quad bridge power amplifier circuits

Procurement Notes

Verify the specific suffix 'AH' against the manufacturer's official datasheet to confirm pinout compatibility and functional equivalence with other TDA7850 variants. Ensure the procurement source provides valid RoHS compliance documentation and confirms the Flexiwatt-27 package type. Cross-reference the part number with the latest STMicroelectronics ordering information to avoid discrepancies in packaging or revision levels.

Selection Notes

Select this component when designing automotive audio systems requiring high output power with low distortion. The integrated high-side driver and fixed gain simplify the circuit design by minimizing external components. Consider the 27-Flexiwatt package for adequate thermal management in high-power applications. Verify that the application environment supports the specified operating temperature range and supply voltage requirements.

Part Context

The TDA7850AH belongs to the TDA7850 series of audio amplifiers developed by STMicroelectronics. This series is characterized by its MOSFET output stage technology, which allows for high efficiency and superior sound quality in automotive environments. The TDA7850A variant serves as the primary reference for this family, offering robust performance for demanding car audio applications.

Replacement Considerations

The TDA7850H is a documented substitute within the same product family. Verify mechanical fit and electrical specifications before substitution.