TDF8534HH/N2/S710Y

Overview

The TDF8534HH/N2/S710Y is a five-channel Class-D audio amplifier from the NXP 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 Ω or 4 Ω loads. The device features a single digital-feedback loop with feedback after the low-pass filter to enhance audio quality and reduce bill of materials cost. It supports TDM/I²S digital inputs and includes comprehensive protection mechanisms such as load dump protection up to 50 V, thermal fold-back, and independent output current monitoring.

Feature Summary

• Single digital-feedback loop architecture with post-filter feedback for superior sound quality
• Five BTL channels capable of driving 2 Ω or 4 Ω loads, with parallel mode support
• AEC-Q100 qualified for automotive reliability standards
• Integrated diagnostics including startup checks, DC offset detection, and IEEE 1194.1 boundary scan

Applications

• Automotive head-unit radios
• Vehicle sound systems
• Active noise-cancellation systems
• Electric vehicle engine sound design

Procurement Notes

Verify the specific ordering suffix S710Y against official manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing board layouts regarding the HLQFP100 package dimensions and thermal requirements. Confirm that the 5.5 V to 25 V operating range aligns with the target vehicle's power supply characteristics.

Selection Notes

Select this component when five high-power channels are required in an automotive environment. Compare against the TDF8536HH if higher voltage (45 V) or higher power (140 W) per channel is needed. Consider the TDF8532HH for four-channel configurations. Evaluate the interleaved power stage option if improved EMC performance is critical for the specific application.

Part Context

This part belongs to the NXP TDF853x series of ultra-efficient Class-D amplifiers. The series includes variants with three, four, or five channels, supporting various supply voltages up to 45 V. These amplifiers are engineered to provide seamless audio experiences in vehicles, particularly those supporting 5.5 V stop-start systems.

Replacement Considerations

Official substitutes within the same family include the TDF8534BHH for 18 V operation or the TDF8536HH for 45 V high-power applications. Verify pinout and thermal characteristics before substitution. No direct cross-family replacements are officially confirmed in the provided datasheet.

FAQ

What is the maximum supply voltage for the TDF8534HH?

The TDF8534HH supports a supply voltage range from 5.5 V to 25 V.

Does the TDF8534HH support parallel channel operation?

Yes, two BTL channels can be combined to drive a 1 Ω load using the parallel mode feature.

What diagnostic features are included?

It includes startup diagnostics for AC/DC coupled loads, supply voltage feedback with 8-bit resolution, selectable clip detection, DC output offset diagnostics, and IEEE 1194.1-compliant board-level boundary scan.