The TAS6424E-Q1 device is a four-channel digital-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency enabling a cost-optimized solution in a very small PCB size, full operation down to 4.5 V for start/stop events, and exceptional sound quality with up to 40 kHz audio bandwidth.

The output switching frequency can be set 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 as well as detection of AC-coupled tweeters to help to reduce test time during the manufacturing process.

The devices adds EMI management features including spread-spectrum, output phase offset and optimized slew rate to assist in system level EMI challenges.

The TAS6424E-Q1 Class-D audio amplifier is designed for use in automotive head units and external amplifier modules. For pin compatible one, two and four-channel devices see the the Device Options table.

• AEC-Q100 Qualified for automotive applications

• Temperature grade 1: –40°C to +125°C TA

• 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

• 4 Channel I2S or 4/8-channel TDM input

• Input sample rates: 44.1 kHz, 48 kHz, 96 kHz

• Input formats: 16-bit to 32-bit I2S, and TDM

• Support for high resolution audio systems

• Audio outputs

• Four-channel bridge-tied load (BTL)

• Two-channel parallel BTL (PBTL)

• Up to 2.1 MHz output switching frequency

• 45 W, 10% THD Into 2 Ω at 14.4 V BTL

• 75 W, 10% THD Into 4 Ω at 25 V BTL

• 150W, 10% THD Into 2 Ω at 25 V PBTL

• Audio performance into 4 Ω at 14.4 V BTL

• THD+N <0.009% at 1 W

• 30 µVRMS output noise

• –97 dB crosstalk

• Load diagnostics

• Open load, shorted load, short-to-battery, short-to-ground

• Line output detection up to 6 kΩ

• Protection

• Output current limiting and short protection

• 40 V Load dump

• Open ground and power tolerant

• DC offset

• Over-temperature, undervoltage, and overvoltage

• General operation

• 4.5 V to 26.4 V supply voltage

• I2C Control with 4 address options

• Latched and non-latched clip detect

• Enhanced EMI management