TDA7850AEP

Overview

The TDA7850AEP 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 bridge-tied load (BTL) outputs with an onboard 0.35 A high-side driver. Key electrical parameters include a maximum supply voltage of 18 V, an operating temperature range from -55 °C to +150 °C, and a fixed internal gain of 26 dB. It supports low impedance loads down to 2 Ω.

Feature Summary

• Integrates DC offset detection and automute functionality at minimum supply voltage.
• Features comprehensive protection against short circuits, overtemperature, reversed battery, and load dump.
• Requires minimal external components due to internally fixed gain and lack of need for bootstrap capacitors.

Applications

• High-power automotive audio systems
• Car radio amplifiers
• Vehicle infotainment speaker driving

Procurement Notes

Verify the specific suffix 'AEP' against official STMicroelectronics documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with Flexiwatt-27 mounting requirements. Confirm that the intended application meets the AEC-Q100 qualification standards required for automotive environments.

Selection Notes

Select this component when designing automotive audio systems requiring high efficiency and robust protection without complex external compensation networks. The integrated high-side driver simplifies circuit design compared to standard BTL amplifiers. Consider the thermal management capabilities provided by the Flexiwatt package for high-power continuous operation.

Part Context

The TDA7850AEP belongs to the TDA7850 series of automotive audio amplifiers from STMicroelectronics. This series represents a breakthrough in MOSFET technology for Class-AB amplifiers, offering superior distortion performance and power density. It is part of a broader family of automotive-grade audio solutions designed to meet strict reliability standards.

Replacement Considerations

Check for direct substitutes such as the TDA7850 or TDA7850H if pinout and package compatibility are confirmed. Verify functional equivalence regarding gain, protection features, and thermal characteristics before substitution.