TDA7350

Overview

The TDA7350 is a Class AB audio power amplifier in a Multiwatt-11 package designed for car radio applications. It operates on an 8V to 18V supply and delivers up to 22W bridge or 11W stereo output. The device features a fully complementary PNP/NPN output stage that eliminates the need for bootstrap capacitors. Key electrical parameters include a fixed gain of 30dB, a standby current of 100μA, and a thermal shutdown threshold at 150°C.

Feature Summary

• Fully complementary PNP/NPN output configuration enables high power performance without bootstrap capacitors.
• Delayed turn-on mute circuit eliminates audible on/off noise during operation transitions.
• Novel short circuit protection system prevents spurious intervention with highly inductive loads.
• Stereo and bridge configurations are selectable without additional external components.

Applications

• Car radio audio amplification
• Bridge mono speaker driving
• Stereo dual speaker driving

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm package integrity upon receipt as the Multiwatt-11 housing requires careful handling. Check datasheet revisions for any updates to absolute maximum ratings or thermal characteristics before finalizing integration into automotive systems.

Selection Notes

Select this component for designs requiring minimal external parts count and robust protection against inductive load transients. Ensure adequate heatsinking is provided given the 36W dissipation rating at 85°C case temperature. Verify that the application environment stays within the specified -40°C to 150°C junction temperature range.

Part Context

This part belongs to the TDA7350 series of automotive audio amplifiers. It utilizes advanced bipolar technology with top-bottom isolation techniques. The design focuses on reducing component count while maintaining high reliability and low distortion for vehicle infotainment systems.

Replacement Considerations

No public confirmed substitute part numbers are available in the source material.

FAQ

How does the TDA7350 handle highly inductive loads?

It employs a novel short circuit protection system specifically designed to prevent spurious intervention when connected to highly inductive loads.

What mechanism prevents pop noise during power cycles?

A delayed turn-on mute circuit ensures the amplifier remains muted until the SVR pin reaches the play threshold, eliminating audible on/off noise.