TDF8532HH/N2/S710K

Overview

The TDF8532HH/N2/S710K is a four-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 4 x 80 W output power into 2 or 4 Ω loads. The device features a single digital-feedback loop with feedback after the low-pass filter, ensuring high sound quality and reduced system cost. Key specifications include a THD+N of 0.02% and noise of 26 µV. It supports TDM/I²S digital inputs and includes comprehensive diagnostic and protection features.

Feature Summary

• Four BTL channels capable of driving 2 or 4 Ω loads, with parallel mode allowing two channels to drive a 1 Ω load
• Single digital-feedback loop architecture with post-filter feedback for superior audio performance and lower BOM cost
• Comprehensive diagnostic suite including startup diagnostics, supply voltage monitoring, clip detection, and DC offset checks
• Robust protection mechanisms featuring independent current thresholds, load dump protection, over/undervoltage protection, and thermal fold-back

Applications

• Automotive head-unit radios
• Vehicle sound systems
• Active noise-cancellation systems
• Automotive-engine sound design
• Ambient and engine sound generation in electric vehicles

Procurement Notes

Verify the specific ordering suffix /N2/S710K against official manufacturer documentation to confirm packaging, tape-and-reel quantities, and regional compliance details. Ensure compatibility with existing board layouts and thermal management solutions before procurement.

Selection Notes

Select this part for applications requiring four high-power channels with precise digital control. Compare against the TDF8531HH (three channels) or TDF8534HH (five channels) based on channel count needs. Consider the TDF8532BHH if an 18 V maximum supply limit is sufficient, as it offers lower THD+N.

Part Context

This component belongs to the NXP TDF853x series of ultra-performance 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 meet AEC-Q100 standards and support 5.5 V stop-start vehicle requirements.

Replacement Considerations

Official substitutes within the same family include the TDF8531HH, TDF8534HH, and TDF8532BHH. Verify channel count, maximum supply voltage, and THD+N specifications when substituting to ensure functional equivalence.

FAQ

Can two channels of the TDF8532HH be combined to drive a lower impedance load?

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

What type of digital input format does the TDF8532HH support?

The device supports digital input in TDM or I²S format to facilitate easy board layout.

Does the TDF8532HH include EMC improvement features?

Interleaved power stages are available as an optional feature in the TDF853x family to improve EMC and reduce output-filter complexity.