Automotive 2-MHz Class-D, 4-Channel, 21-W Audio Amplifier in Class AB Form-Factor Reference Design
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Key Document


The TIDA-00743 reference design is a small module designed for evaluation of a digital-input class-D audio amplifier in a system which has been designed for a typical class AB audio power amplifier module. This design demonstrates the reduction in power dissipation that a class D amplifier provides. This design demonstrates how 2.1 MHz operation of a TAS6424-Q1 enables a compact power amplifier solution.

  • Audio output power: 21W per channel at 1% THD+N
  • Meets automotive CISPR25 Class-5 EMI requirements
  • Wide power supply voltage range of 4.5V to 18V
  • 40V load dump protection
  • Small size:  42.3mm x 53.5mm

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CDCS504-Q1  Clock buffer/clock multiplier  Clocks & timing  Sample & Buy Not Available
MSP430G2332-EP  Enhanced product Mixed Signal Microcontroller  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
PCM1865-Q1  Automotive 110dB 4-Channel Software-Controlled Audio ADC With Universal Front End  Audio converters  Sample & Buy View Design Kits & Evaluation Modules
TAS6424-Q1  Automotive, 75-W, 2-MHz, 4-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump  Audio amplifiers  Not Available View Design Kits & Evaluation Modules
TPS7B67-Q1  Automotive 450-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator with PG  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CDCS504-Q1 Download Download
MSP430G2332-EP Download Download
PCM1865-Q1 Download Download
TAS6424-Q1 Download
TPS7B67-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 15002 17 May 2017
Design files (12)
Title Type Size (KB) Date
ZIP 1811 17 Jul 2017
ZIP 2842 17 Jul 2017
ZIP 2892 17 Jul 2017
ZIP 1211 17 Jul 2017
PDF 930 17 Jul 2017
PDF 1580 17 Jul 2017
PDF 148 17 Jul 2017
PDF 256 17 Jul 2017
PDF 26 17 Jul 2017
PDF 29 17 Jul 2017
PDF 427 17 Jul 2017
PDF 514 17 Jul 2017
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Automotive 4-Channel Class D Amplifier Reference Design for Head Unit  TIDA-00573  Reference design 

Hardware development (1)

Name Part Number Tool Type
4-Ch Analog Input Class-D Audio Amp EVM w/I2C Diagnostics & Protection for Auto Head Unit  TAS5404Q1EVM  Evaluation board 

Software development (1)

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