TDF8534HH/N3K

Overview

The TDF8534HH/N3K is a five-channel Class-D audio amplifier from NXP's TDF853x family, designed for automotive applications. It operates within a supply voltage range of 5.5 V to 25 V and delivers up to 80 W per channel into 2 or 4 Ω loads. The device features a single digital-feedback loop positioned after the low-pass filter to enhance audio quality and reduce bill-of-materials costs. It supports TDM/I²S digital inputs and includes comprehensive diagnostic and protection features such as load dump protection and thermal fold-back.

Feature Summary

• Single digital-feedback loop architecture for superior sound quality
• Five BTL channels with parallel mode capability for 1 Ω loads
• Integrated diagnostics including startup checks and clip detection
• Robust protection against overvoltage, undervoltage, and thermal issues

Applications

• Automotive head-unit radios
• Vehicle sound systems
• Engine sound design in electric vehicles
• Active noise-cancellation systems

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing. Confirm that the component meets AEC-Q100 quality standards required for automotive integration. Ensure compatibility with existing board layouts regarding the HLQFP-100 package dimensions and pin configuration.

Selection Notes

Select this model for designs requiring five independent audio channels with high power output. Consider the parallel mode feature if driving lower impedance loads is necessary. Evaluate the idle power dissipation specifications against thermal management capabilities in the final enclosure design.

Part Context

This component belongs to the NXP TDF853x series of ultra-performance Class-D amplifiers. The family includes variants with three, four, or five channels, supporting various supply voltages up to 45 V. These devices are engineered to provide seamless audio experiences in vehicles supporting stop-start technology.

Replacement Considerations

The TDF8534BHH is a related variant within the same family but operates at a maximum supply voltage of 18 V rather than 25 V. Verify voltage requirements before substitution. Other family members like the TDF8531HH offer fewer channels.