TDF8531HH/N2/S710Y

Overview

The TDF8531HH/N2/S710Y is a three-channel Class-D audio amplifier from NXP, 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 4 Ω loads. The device features a single digital-feedback loop with feedback after the low-pass filter to reduce BOM cost and improve audio quality. It supports TDM/I²S digital inputs and includes comprehensive diagnostic and protection features such as load dump protection up to 50 V.

Feature Summary

• Single digital-feedback loop architecture reduces system cost while maintaining high sound quality
• Feedback after low-pass filter enables lower bill of materials and superior audio performance
• Comprehensive diagnostic capabilities including startup checks, supply monitoring, and clip detection
• Robust protection mechanisms including independent output current thresholds and thermal fold-back

Applications

• Automotive head-unit radio systems
• Vehicle sound systems and active noise cancellation
• Automotive engine sound design generation
• Ambient sound synthesis in electric vehicles

Procurement Notes

Verify the specific suffix /N2/S710Y against official manufacturer documentation to confirm package type, tape-and-reel specifications, and regional compliance status. Ensure compatibility with existing board layouts and power supply constraints before procurement.

Selection Notes

Select this component for designs requiring three high-power channels with integrated digital control. Compare THD+N and idle power dissipation against other family members like the TDF8532HH if four channels are needed. Confirm that the 5.5 V to 25 V operating range meets the vehicle's electrical system requirements.

Part Context

This part belongs to the NXP TDF853x series of ultra-efficient Class-D amplifiers. The series is engineered to support 5.5 V stop-start vehicle requirements and provides seamless audio experiences. Other variants include models with four or five channels, and versions supporting higher voltages up to 45 V for different loudspeaker configurations.

Replacement Considerations

Official substitutes within the same family include the TDF8532HH for four-channel applications or the TDF8536HH for higher voltage requirements. Verify pinout compatibility and thermal management needs when considering these alternatives.

FAQ

What is the maximum load dump protection voltage for the TDF8531HH?

The device offers load dump protection up to 50 V.

Does the TDF8531HH support interleaved power stages?

Yes, interleaved power stages are optional for this model to improve EMC and reduce output-filter complexity.