TDF8546J/N1,112

Overview

The TDF8546J/N1,112 is a complementary quad Bridge-Tied Load (BTL) audio power amplifier intended for automotive applications. It operates at a battery voltage as low as 6 V, making it suitable for stop/start-car operation. The device features a new best efficiency mode with full I2C-bus controlled diagnostics, including start-up diagnostics. It utilizes a patented switch technique to reduce switching distortion and employs a complementary DMOS output stage in a silicon-on-insulator (SOI) based BCD process. This architecture ensures high-power output with perfect sound quality while preventing latch-up and ensuring good separation between the four independent channels.

Feature Summary

• Stop/start-car prepared operation without audible disturbance during engine start
• New best efficiency mode with patented low switching distortion
• Extreme best efficiency mode using information from all four channels
• Operates in either legacy or I2C-bus modes compliant with 3.3 V and 5 V

Applications

• Automotive connected radio systems
• Entry-level infotainment systems with USB, AM/FM and Bluetooth connectivity
• Car audio amplifiers requiring high efficiency and robust diagnostics

Procurement Notes

Verify the specific suffix against official NXP documentation, as the provided reference data primarily lists the TDF8546J/N2ZU variant. Confirm current manufacturing status, as related TDF8546 variants have been marked as obsolete or end-of-life in some distributor records. Ensure the ordering code matches the exact package and temperature range requirements for your design. Cross-reference the datasheet revision to confirm pinout and electrical specifications align with your schematic before procurement.

Selection Notes

Select this component for designs requiring a quad-channel amplifier with integrated I2C diagnostics and high efficiency in automotive environments. The SOI-based BCD process offers robustness against latch-up and substrate currents. Consider the 6 V minimum operating voltage for compatibility with stop/start vehicle architectures. Evaluate the need for I2C bus control versus legacy hardware programming based on system complexity and cost constraints.

Part Context

The TDF8546 belongs to NXP's portfolio of car audio amplifiers designed for scalable infotainment solutions. It complements other NXP components such as the i.MX series processors and SAF9000 radio chipsets in connected radio systems. The amplifier is part of a family that includes similar models like the TDF8541, offering varying channel configurations and power outputs for different automotive audio application tiers.