TDF8546ATH/N1ZJ

Overview

The TDF8546ATH/N1ZJ is a quad Class-AB audio power amplifier designed for automotive applications. It operates within a supply voltage range of 6 V to 18 V and delivers an output power of 25 W at 10% THD into a 4 Ω load. The device utilizes an asymmetrical input configuration and is housed in a 36-lead HSOP36 package. It features Best Efficiency Mode with patented low switching distortion, reducing dissipation by up to 17% compared to standard modes.

Feature Summary

• Operates without audible disturbance during engine start at battery voltages as low as 6 V
• Features Best Efficiency Mode using information from all four channels to reduce power dissipation
• Includes full diagnostics with programmable thermal pre-warning and clip detection
• Provides independent short-circuit protection per channel and thermal protection

Applications

• Automotive Head Unit
• Automotive Hybrid Sound System

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and marking variations. Ensure compatibility with I2C bus control requirements and check for any updates regarding the AEC-Q100 qualification status before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring seamless audio playback during stop-start operations. Consider its 25 W output capability and asymmetrical input configuration. Evaluate the need for Best Efficiency Mode to optimize thermal performance in high-density infotainment designs.

Part Context

This part belongs to the NXP TDF854x family of quad Class-AB amplifiers. The family includes variants like the TDF8541 and TDF8544, offering scalable output powers and different control interfaces. All devices in this series are qualified according to the Automotive Electronics Council (AEC) standard Q100.

Replacement Considerations

TDF8546TH/N1ZJ