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

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

 

Recommended alternative devices

For a pin-to-pin compatible 2-channel alternative, see TAS6422-Q1.

For a pin-to-pin compatible 1-channel alternative, see TAS6421-Q1.

Description

The TAS6424-Q1 device is a Four-channel digital-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency that enables 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 TAS6424-Q1 Class-D audio amplifier is 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 filter size and cost, or below AM band to optimize efficiency.

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.

Features

  • 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-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
    • 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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Parametrics

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Part number Order Audio input type Architecture Speaker channels (Max) Power stage supply (Min) (V) Power stage supply (Max) (V) Output power (W) Load (Min) (ohms) THD + N @ 1 kHz (%) Iq (Typ) (mA) Control interface Closed/open loop Analog supply (Min) (V) Analog supply (Max) (V) Power to parallel bridge tied load (Max) (W) Sampling rate (Max) (kHz) PSRR (dB) Operating temperature range (C) Rating
TAS6424-Q1 Order now Digital Input     Class-D     4     4.5     26.4     75     1     0.02     165     I2C     Closed     4.5     26.4     150     96     75     -40 to 125     Automotive    
TAS6421-Q1 Order now Digital Input     Class-D     Mono     4.5     26.4     75     2     0.02     47     I2C     Closed     4.5     26.4       96     75     -40 to 125     Automotive    
TAS6422-Q1 Samples not available Digital Input     Class-D     Stereo     4.5     26.4     75     2     0.03     120     I2C     Closed     4.5     26.4     150     96     75     -40 to 125     Automotive    
TAS6424L-Q1 Order now Digital Input     Class-D     4     4.5     18     75     2     0.03     165     I2C     Closed     4.5     18     70     96     70     -40 to 125     Automotive    
TAS6424M-Q1 Order now Digital Input     Class-D     4     4.5     18     45     1     0.02     165