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

The TAS6424-Q1 device is a Four-channeldigital-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency thatenables a cost-optimized solution in a very small PCB size, full operation down to 4.5 V forstart/stop events, and exceptional sound quality with up to 40 kHz audio bandwidth

The TAS6424-Q1 Class-D audio amplifier is designed for use inautomotive head units and external amplifier modules. The device providesfour channels at27 W into 4 Ω at 10% THD+N and 45 W into 2 Ω at 10% THD+N from a 14.4-V supplyand 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-bandinterference and reduces output filter size and cost, or below AM band to optimizeefficiency.

For a pin compatible two-channel amplifier, see the TAS6422-Q1

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

• Advanced Load Diagnostics
  • Runs without Input Clocks
  • AC Diagnostic for Tweeter Detection with Impedance and Phase Response
• Easy to meet CISPR25-L5 EMC Specification
• 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-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
  • Host-Independent Operation
  • Programmability for Flexible Production Line Testing
• Protection
  • Output Current Limiting
  • Output Short Protection
  • 40-V Load Dump
  • Open Ground and Power Tolerant
  • DC Offset
  • Overtemperature
  • Undervoltage and Overvoltage
• General Operation
  • 4.5-V to 26.4-V Supply voltage
  • I²C Control With 4 Address Options
  • Clip Detection and Thermal Warning

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