TAS6424MSQDKQRQ1

Overview

The Texas Instruments TAS6424MS-Q1 is a four-channel digital-input Class-D automotive audio amplifier. It operates on a 4.5 V to 18 V supply and supports up to 2.1 MHz PWM switching frequency. Output power reaches 27 W into 4 Ω or 45 W into 2 Ω at 14.4 V BTL, and 80 W into 2 Ω at 18 V PBTL. Audio performance includes less than 0.02% THD+N at 1 W and 42 µVRMS output noise. The device features I2C diagnostics, load dump protection up to 40 V, and AEC-Q100 Grade 1 qualification for -40°C to +125°C operation.

Feature Summary

• Advanced load diagnostics including DC detection without input clocks and AC impedance measurement for tweeter identification.
• Integrated EMI management with spread spectrum and optimized slew rates to meet CISPR25-L5 specifications.
• Robust protection mechanisms featuring 40 V load dump tolerance, over-temperature shutdown, and short-circuit protection.
• Digital interface supporting 4-channel I2S or 4/8-channel TDM inputs with sample rates up to 96 kHz.

Applications

• Automotive head units
• Automotive external amplifier modules

Procurement Notes

Verify the specific suffix 'DKQRQ1' against the manufacturer's current orderable addendum to confirm package type and reel configuration. Ensure the design environment meets the AEC-Q100 Grade 1 temperature requirements of -40°C to +125°C. Confirm that the system power architecture strictly adheres to the 4.5 V to 18 V recommended operating conditions to maintain functional integrity.

Selection Notes

Select this component when a cost-optimized solution with small PCB area is required for automotive audio systems. It is suitable for designs needing full operation down to 4.5 V for start/stop events. Choose this model over higher voltage variants if the application does not require support for voltages exceeding 18 V. The integrated diagnostics reduce manufacturing test times by detecting misconnected outputs.

Part Context

This device belongs to the TAS6424 family of digital input Class-D amplifiers from Texas Instruments. It shares architectural similarities with the TAS6424-Q1 and TAS6424M-Q1 but is distinguished by its specific 18 V maximum supply limit and MS package variant. It serves as a high-efficiency alternative to traditional Class-AB amplifiers in vehicle sound systems.

Replacement Considerations

TAS6424MSQ1EVM

FAQ

Can the TAS6424MS-Q1 operate without an input clock for diagnostics?

Yes, the device supports DC diagnostics that run without input clocks, allowing for host-independent fault detection during manufacturing.

What is the maximum load dump voltage supported by this amplifier?

The TAS6424MS-Q1 provides protection against load dump events up to 40 V.