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Texas Instruments TAS6424E-Q1 Quad Class-D Audio Amplifier

Texas Instruments TAS6424E-Q1 Quad Class-D Audio Amplifier is a four-channel digital input Class-D audio amplifier that implements a 2.1MHz PWM switching frequency. This feature enables a cost-optimized solution in a tiny PCB size, full operation down to 4.5V for start/stop events, and exceptional sound quality with up to 40kHz audio bandwidth. The output switching frequency can be set at either above the AM band, which eliminates AM-band interferences and reduces output filtering and cost, or below the AM band to optimize efficiency.

The device has a built-in load diagnostic function for detecting and diagnosing misconnected outputs and detection of AC-coupled tweeters to help reduce test time during the manufacturing process. The devices add EMI management features, including spread-spectrum, output phase offset, and optimized slew rate to assist system-level EMI challenges. The Texas Instruments TAS6424E-Q1 Class-D audio amplifier is used in automotive head units and external amplifier modules.

Features

AEC-Q100 Qualified for automotive applications
- –40°C to +125°C T_A temperature grade 1
Advanced load diagnostics
- DC Diagnostics run without input clocks
- AC Diagnostic for tweeter detection with impedance and phase response
Easily meets CISPR25-L5 EMC specifications
Audio inputs
- Four-channel I²S or 4/8-channel TDM input
- 44.1kHz, 48kHz, 96kHz input sample rates
- 16-bit to 32-bit I²S, and TDM input formats
- Support for high-resolution audio systems
Audio outputs
- Four-channel bridge-tied load (BTL)
- Two-channel parallel BTL (PBTL)
- Up to 2.1MHz output switching frequency
- 45W, 10% THD Into 2Ω at 14.4V BTL
- 75W, 10% THD Into 4Ω at 25V BTL
- 150W, 10% THD Into 2Ω at 25V PBTL

Audio performance into 4Ω at 14.4V BTL
- THD+N <0.009% at 1W
- 30µV_RMS output noise
- –97dB crosstalk
Load diagnostics
- Open load, shorted load, short-to-battery, short-to-ground
- Line output detection up to 6kΩ
Protection
- Output current limiting and short protection
- 40V Load dump
- Open ground and power tolerant
- DC offset
- Over-temperature, undervoltage, and overvoltage
General operation
- 4.5V to 26.4V supply voltage
- I²C Control with four address options
- Latched and non-latched clip detect
- Enhanced EMI management

Applications

Automotive head unit
Automotive external amplifier

Texas Instruments TAS6424E-Q1 Quad Class-D Audio Amplifier

Features

Applications

Functional Block Diagram

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