TDF8546J/N2,112

Overview

The TDF8546J/N2,112 is a Class-AB quad bridge-tied load (BTL) audio power amplifier manufactured by NXP Semiconductors. Designed for automotive applications, it delivers 45 W output power into a 4-ohm load with a total harmonic distortion plus noise of 0.03%. The device operates on a supply voltage ranging from 6 V to 18 V and features a DBS-27 package. It supports I2C-bus control for diagnostics and includes protection against short circuits and thermal overload.

Feature Summary

• Integrated best efficiency mode utilizing patented switch techniques to reduce switching distortion and minimize power dissipation across all four channels.
• Capable of maintaining operation without audible disturbance during engine start events at battery voltages as low as 6 V.
• Features full I2C-bus controlled diagnostics including start-up checks and hardware-programmable addressing.

Applications

• Automotive audio systems requiring stop/start-car preparedness
• High-efficiency multi-channel audio amplification
• Vehicle infotainment systems

Procurement Notes

Verify the specific suffix J/N2,112 against official NXP documentation to confirm pinout and packaging details. Ensure compatibility with existing PCB footprints and thermal management requirements. Confirm availability status as automotive components may have extended lead times or lifecycle restrictions.

Selection Notes

Select this component for designs requiring high power output in a compact automotive form factor. Consider the DBS-27 package constraints and the necessity for I2C bus integration if diagnostic monitoring is required. Evaluate thermal performance under maximum load conditions given the 45 W output capability.

Part Context

This part belongs to the TDF8546 family of complementary quad BTL audio power amplifiers. It utilizes a silicon-on-insulator (SOI) based BCD process to ensure robustness against latch-up and provide excellent channel separation. The series is optimized for modern automotive electrical architectures.

Replacement Considerations

Consult NXP datasheets for direct cross-references within the TDF854x series. Verify functional equivalence regarding I2C protocols and pin configurations before substituting with other audio amplifier models.