1 Features
• 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, shortto-
ground
– Line output detection up to 6 kΩ
• Protection
– Enhanced reverse current capabilities
– 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

2 Applications
• Automotive head unit
• Automotive external amplifier

3 Description
The TAS6424R-Q1 device is a four-channel digitalinput
Class-D audio amplifier that implements a
2.1 MHz PWM switching frequency enabling a costoptimized
device 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 TAS6424R-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.