75-W 2.1-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier - TAS6424-Q1


75-W 2.1-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier



The TAS6424-Q1 device is a Four-channel digital-input Class-D audio amplifier designed for use in automotive head units and external amplifier modules. The device provides four channels at 27 W into 4 Ω at 10% THD+N and 45 W into 2 Ω at 10% THD+N from a 14.4-V supply and 75 W into 4 Ω at 10% THD+N from a 25-V supply. The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions. The output switching frequency can be set either above the AM band, which eliminates the AM-band interference and reduces output filtering and cost, or below AM band to optimize efficiency.

The wide supply-voltage range from 4.5 V to 26.4 V helps minimize audio artefacts in start-stop applications

The device incorporates all the functionality required to perform in the demanding OEM applications area. The device has a built-in load diagnostic function for detecting and diagnosing misconnected outputs as well as detection AC-coupled tweeters to help to reduce test time during the manufacturing process.

The device is offered in a 56-pin HSSOP PowerPAD package with the exposed thermal pad up.

For all available packages, see the orderable addendum at the end of the datasheet.


  • Qualified for Automotive Applications
  • 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
  • Audio Outputs
    • Four-Channel Bridge-Tied Load (BTL), With Option of Parallel BTL (PBTL)
    • Up to 2.1-MHz Output Switching Frequency
    • 75 W, 10% THD Into 4 Ω at 25 V
    • 45 W, 10% THD Into 2 Ω at 14.4 V
    • 150 W, 10% THD Into 2 Ω at 25 V PBTL
  • Audio Performance Into 4 Ω at 14.4 V
    • THD+N < 0.03% at 1 W
    • 42-µVRMS Output Noise
    • –90-dB Crosstalk
  • Load Diagnostics
    • Output Open and Shorted Load
    • Output-to-Battery or Ground Shorts
    • Line Output Detection Up to 6 kΩ
    • Runs Without Input Clocks
    • AC Diagnostic for Tweeter detection
  • Protection
    • Output Current Limiting
    • Output Short Protection
    • 40-V Load Dump
    • Open Ground and Power Tolerant
    • DC Offset
    • Overtemperature
    • Undervoltage and Overvoltage
  • General Operation
    • EVM Passes CISPR25-L5 EMC Specification
    • 4.5-V to 26.4-V Supply voltage
    • I2C Control With 4 Address Options
    • Clip Detection and Thermal Warning

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Parametrics Compare all products in Digital I2S Input Class-D

Speaker Channels (Max)
Power to Bridge Tied Load (Max) (W)
Power to Parallel Bridge Tied Load (Max) (W)
Supported Bridge Tied Load (Min) (Ohms)
Closed/Open Loop
Control Interface
Analog Supply (V) (Min)
Analog Supply (V) (Max)
Power Stage Supply (Max) (V)
Audio Input Type
Sampling Rate (Max) (kHz)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
TAS6424-Q1 TAS6422-Q1
4    2   
75    75   
150    150   
2    2   
Closed    Closed   
I2C    I2C   
4.5    4.5   
26.4    26.4   
26.4    26.4   
Digital    Digital   
96    96   
-40 to 125    -40 to 125   
Automotive    Automotive   
56HSSOP: 191 mm2: 10.35 x 18.42(HSSOP)    56HSSOP: 191 mm2: 10.35 x 18.42(HSSOP)