TPA6404QDKQRQ1

Overview

The TPA6404QDKQRQ1 is a four-channel Class-D audio amplifier designed for automotive applications. It features analog differential inputs and operates within a supply voltage range of 4.5 V to 18 V. The device delivers up to 27 W per channel into a 4-ohm load at 14.4 V with 10% THD+N, or 45 W into a 2-ohm load. It utilizes a 2.1 MHz PWM switching frequency to minimize AM interference and reduce filter size. Key performance metrics include less than 0.01% THD+N, 42 μVRMS output noise, and -90 dB crosstalk. It is housed in a 56-pin HSSOP package with an exposed thermal pad.

Feature Summary

• Advanced load diagnostics including impedance and phase response detection for tweeter verification and AC diagnosis.
• Integrated sine wave generator facilitates easy compliance with CISPR25-L5 EMC specifications.
• Supports operation without an external input clock, enhancing system flexibility.
• Offers four I2C-controlled gain options and multiple address settings for simplified integration.

Applications

• Automotive audio head units
• External automotive amplifier modules

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm exact packaging and temperature grade variations. Ensure compatibility with AEC-Q100 requirements for your target automotive environment. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin configurations before finalizing procurement orders.

Selection Notes

Select this component for designs requiring high-efficiency amplification with minimal PCB footprint. The 2.1 MHz switching frequency is suitable for applications sensitive to AM radio interference. Consider the exposed thermal pad for adequate heat dissipation in enclosed automotive enclosures. Verify that the analog input interface matches your source signal type rather than digital interfaces.

Part Context

This device belongs to the Texas Instruments TPA6404 family of automotive-grade audio amplifiers. It is engineered to provide cost-effective solutions for entry-level car audio systems while maintaining high audio fidelity. The Class-D topology significantly improves efficiency compared to traditional linear amplifiers, reducing power consumption and thermal management complexity in vehicle electronics.

Replacement Considerations

Consult official substitution guides for equivalent performance. No direct cross-model substitutes are confirmed in the provided data.