TDA7850H

Overview

The TDA7850H is a Class-AB audio power amplifier utilizing MOSFET technology, designed for high-power car radio applications. It features a quad bridge output configuration delivering up to 4 x 50 W into 4 Ω loads and 4 x 80 W into 2 Ω loads. The device operates within an 8 V to 18 V supply voltage range and supports a junction temperature from -55°C to +150°C. It employs a Flexiwatt-25 package with 25 pins, providing robust performance in automotive environments.

Feature Summary

• MOSFET output stage enabling rail-to-rail voltage swing and low external component count
• Integrated protection mechanisms including short circuit, thermal limiting, and load dump handling
• Automotive-grade reliability compliant with AEC-Q100 standards
• Built-in mute and standby functions with automatic mute at minimum supply voltage

Applications

• High-power car radio systems
• Modern vehicle infotainment audio amplification
• Driver and cabin sound system integration

Procurement Notes

Verify the specific suffix 'H' against the manufacturer datasheet to confirm pinout and packaging orientation differences compared to standard variants. Ensure the procurement source provides original STMicroelectronics documentation rather than third-party summaries. Confirm RoHS compliance status and check for any recent production change notices that may affect physical dimensions or material composition before finalizing orders.

Selection Notes

Select this component when designing automotive audio systems requiring high efficiency and minimal external passive components. The internal fixed gain of 26 dB simplifies circuit design by eliminating the need for external compensation networks. Consider the Flexiwatt-25 package for its thermal management capabilities in space-constrained dashboard installations where high power density is required.

Part Context

This part belongs to the TDA7850 series of AB-class power amplifiers developed by STMicroelectronics. The series is engineered specifically for automotive markets, offering a balance between high-fidelity audio reproduction and ruggedness against electrical noise and voltage transients common in vehicle power supplies.

Replacement Considerations

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