TDF8544J/N3,112

Overview

The TDF8544J/N3,112 is an I2C-bus controlled quad Bridge-Tied Load (BTL) audio power amplifier designed for automotive applications. It utilizes a complementary DMOS output stage in an SOI-based BCD process to ensure robust performance and high sound quality. The device operates at battery voltages as low as 6 V, supporting stop/start-car functionality without audible disturbances. It features full diagnostics, including start-up checks, speaker fault detection, and thermal protection. The amplifier can drive 2 Ω and 4 Ω loads, with maximum output power reaching 50 W per channel.

Feature Summary

• Operates without audible disturbance during engine start at battery voltages as low as 6 V
• Features full I2C-bus controlled diagnostics including start-up load detection and speaker fault detection
• Utilizes SOI-based BCD process for latch-up immunity and excellent channel separation
• Supports both legacy and I2C-bus modes with programmable gain and clip detection

Applications

• Automotive audio systems requiring stop/start compatibility
• Car infotainment systems with integrated amplification
• High-power audio installations needing comprehensive diagnostic feedback
• Vehicle audio setups requiring robust protection against electrical faults

Procurement Notes

Verify the specific ordering suffix and package type when sourcing this component. Confirm availability status as distribution channels may vary. Ensure compatibility with existing system voltage requirements and I2C bus configurations before integration.

Selection Notes

Select this amplifier for applications requiring high power output with advanced diagnostic capabilities. Consider the SOI-based construction for environments demanding high reliability and noise immunity. Evaluate the I2C control interface needs against legacy mode options for system design flexibility.

Part Context

This part belongs to the TDF8544 series of complementary quad BTL audio power amplifiers from NXP Semiconductors. It is specifically engineered for automotive use, offering superior performance compared to standard amplifiers through its specialized manufacturing process and extensive diagnostic features.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers. Verify pin compatibility and functional equivalence before considering alternatives.

FAQ

How does the TDF8544 handle engine start events?

The amplifier remains operational at battery voltages as low as 6 V and uses start-up diagnostics to prevent audible plops during engine starts.

What diagnostic features are available?

It includes start-up diagnostics, speaker fault detection, thermal pre-warning, and clip detection, all controllable via the I2C-bus or accessible via diagnostic pins.