TAS6424L-Q1 - 27-W, 2-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier

The TAS6424L-Q1 device is a four-channeldigital-input Class-D audio amplifier designed for use in automotive head units and externalamplifier modules. The device provides four channels at 27 W into 4 Ω at 10% THD+N and27 W into 2 Ω at10% THD+N from a 14.4 V supply . The Class-D topology dramatically improves efficiency over traditional linearamplifier solutions. The output switching frequency can be set either above the AM band, whicheliminates the AM-band interference and reduces output filtering and cost, or below AM band tooptimize efficiency.

The wide supply-voltage range from 4.5 V to 18 V helps minimizeaudio artefacts in start-stop applications

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

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

For a pin compatible two-channel devices see theTAS6422-Q1 device.

• 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
  • 27 W, 10% THD Into 4 Ω at 14.4 V
  • 27 W, 10% THD Into 2 Ω at 14.4 V
  • 80 W, 10% THD Into 2 Ω at 18 V PBTL
• Audio Performance Into 4 Ω at 14.4 V
  • THD+N < 0.03% at 1 W
  • 42 µV_RMS 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 18 V Supply voltage
  • I²C Control With 4 Address Options
  • Clip Detection and Thermal Warning

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