TAS6424EQDKQRQ1

Overview

The TAS6424EQDKQRQ1 is a four-channel digital-input Class-D audio amplifier designed for automotive applications. It features a 2.1 MHz PWM switching frequency, enabling cost-optimized solutions with small PCB footprints and full operation down to 4.5 V for start/stop events. The device supports up to 40 kHz audio bandwidth and offers output power of 75 W into 4 Ω at 25 V BTL or 150 W into 2 Ω at 25 V PBTL. It includes advanced load diagnostics, enhanced EMI management, and I2C control.

Feature Summary

• Advanced load diagnostics including DC and AC detection for tweeter impedance and phase response without input clocks
• Enhanced EMI management features such as spread-spectrum, output phase offset, and optimized slew rate
• Supports high-resolution audio systems via 4-channel I2S or 4/8-channel TDM inputs with sample rates up to 96 kHz
• Robust protection mechanisms including 40 V load dump tolerance, overcurrent limiting, and overtemperature shutdown

Applications

• Automotive head units
• Automotive external amplifier modules

Procurement Notes

Verify the specific ordering suffix DKQRQ1 against the manufacturer's current datasheet to confirm package type (HSSOP-56) and tape-and-reel specifications. Ensure compatibility with system voltage requirements, specifically the 4.5 V to 26.4 V supply range. Confirm that the AEC-Q100 Grade 1 qualification meets the target temperature range of –40°C to +125°C for the intended automotive environment.

Selection Notes

Select this component when high channel count and digital interface integration are required in space-constrained automotive designs. The 2.1 MHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 7.2 A channel current limit and 150 W PBTL capability if driving low-impedance loads in parallel configurations. Verify I2C address pin settings to avoid conflicts in multi-device systems.

Part Context

This part belongs to the Texas Instruments TAS6424E-Q1 family of four-channel digital input Class-D amplifiers. It is distinguished by its higher channel current limit (7.2 A typical) compared to other variants like the TAS6424L-Q1 or TAS6424M-Q1, which have lower limits of 4.8 A and 6.5 A respectively. This higher current capability enables greater output power in parallel bridge-tied load modes.

Replacement Considerations

TAS6424EQDKQQ1

FAQ

Can the TAS6424EQDKQRQ1 operate during vehicle start/stop events?

Yes, the device provides full operation down to a minimum supply voltage of 4.5 V, ensuring functionality during engine start/stop cycles.

What diagnostic capabilities are included for speaker connections?

The device features advanced load diagnostics that can detect open loads, shorted loads, short-to-battery, and short-to-ground conditions. It also supports AC diagnostics for detecting AC-coupled tweeters by measuring impedance and phase response.