TDA7564B

Overview

The TDA7564B is a quad bridge-type car radio amplifier utilizing Multipower BCD technology and DMOS output stages. It operates within an 8V to 18V supply voltage range and delivers up to 4x28W at 4Ω or 4x72W at 2Ω under standard conditions. The device features high efficiency Class SB operation, reducing thermal dissipation by up to 50% compared to conventional Class AB solutions. It includes full I2C bus control for standby, mute, gain selection, and comprehensive digital diagnostics including load detection, short circuit protection, clipping detection, and linear thermal shutdown.

Feature Summary

• DMOS output stage providing low distortion and high output power capability
• Full I2C bus driving with independent front/rear soft play/mute functions
• Comprehensive digital diagnostics array communicating speaker status via I2C
• High efficiency Class SB structure simplifying thermal management in high-power sets

Applications

• Car radio applications requiring high power output
• Automotive audio systems needing simplified thermal management
• Digital cluster audio integration

Procurement Notes

Verify component status as the TDA7564B is listed as Not Recommended for New Designs (NRND) and subject to End-of-Life (EOL). Confirm availability of remaining stock or qualified alternatives before finalizing design specifications. Ensure compatibility with existing I2C diagnostic protocols if integrating into current automotive infotainment architectures.

Selection Notes

Select this component for designs prioritizing high efficiency and integrated diagnostics over raw maximum power density. The Flexiwatt25/PowerSO36 package suits applications where thermal performance is critical. Consider the I2C interface requirements for system integration and verify that the 8V-18V operating range aligns with the target vehicle's electrical architecture.

Part Context

Part of STMicroelectronics' automotive Class-AB and Class-SB amplifier portfolio. Related devices include the TDA7563B and TDA7569 series, which offer similar diagnostic capabilities but may differ in specific power ratings or voltage operation profiles such as low-voltage start-stop compatibility.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for current recommended replacements due to the NRND status.