TIDA-00733

Automotive 8-Channel Class-D Amplifier with 2.1 MHz Switching Power Supply Reference Design

Design files

TIDA-00733

Design files

Overview

TIDA-00733 is a reference design for an eight-channel, Class-D amplifier that is capable of driving 2-Ω loads and an off-battery step-down power supply with 5-V and 3.3-V outputs. The amplifier design provides audio inputs for each audio channel. A high-performance audio analog-to-digital converter (ADC) creates the digital data stream from the audio inputs and creates the digital timing for the system.

Features

Operating voltage range: 4.5V to 18V
Withstands transients to 40V
2.1 MHz switching frequency for both power supply and Class D amplifiers
45 watts per channel into 2 ohms at 10% total harmonic distortion plus noise
Passes CISPR-25 Class 5 radiated emissions

Automotive

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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

Design guide — TIDA-00733

TIDUCZ2.PDF (7883 K)

Reference design overview and verified performance test data

Schematic — TIDA-00733

TIDRUQ7.PDF (850 K)

Detailed schematic diagram for design layout and components

Bill of materials (BOM) — TIDA-00733

TIDRUQ8.PDF (42 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

Assembly drawing — TIDA-00733

TIDRUQ9.PDF (486 K)

Detailed overview of design layout for component placement

CAD/CAE symbol — TIDA-00733

TIDRUR1.ZIP (2228 K)

Files used for 3D models or 2D drawings of IC components

Gerber file — TIDA-00733

TIDCEA5.ZIP (5557 K)

Design file that contains information on physical board layer of design PCB

PCB layout — TIDA-00733

TIDRUR0.PDF (3089 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LM53635-Q1 — 3.5-A, 36-V synchronous, 2.1-MHz, automotive step-down DC-DC converter

Data sheet: PDF | HTML

Audio ADCs

PCM1865-Q1 — Automotive 110dB 4-Channel Software-Controlled Audio ADC With Universal Front End

Data sheet: PDF | HTML

General-purpose op amps

TLV2462A-Q1 — Automotive-grade, dual, 6-V, 6.4-MHz, 1.5-mV offset, RRIO operational amplifier

Data sheet: PDF | HTML

Ideal diode/ORing controllers

LM74610-Q1 — 0.48-V to 42-V, zero IQ automotive ideal diode controller

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

LP5907-Q1 — Automotive, 250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

LP5912-Q1 — Automotive, 500-mA low-noise low-IQ low-dropout voltage regulator with reverse current protection

Data sheet: PDF | HTML

MSP430 microcontrollers

MSP430G2332-EP — Enhanced product Mixed Signal Microcontroller

Data sheet: PDF

Noninverting buffers & drivers

SN74LVC125A-Q1 — Automotive four-channel 1.65V-to-3.6V buffers with 3-state outputs

Data sheet: PDF | HTML

Speaker amps

TAS6424-Q1 — Automotive, 75-W, 2-MHz, 4-ch, 4.5- to 26.4-V digital input Class-D audio amplifier

Data sheet: PDF | HTML

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Software

Support software

TIDCEA6 — TIDA-00733_Software

TIDCEA6 — TIDA-00733_Software

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Latest version

Version: 01.00.00.00

Release date: 13 Dec 2017

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TIDA-00733_Software (zip) — 4603 K

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Technical documentation

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	Type	Title		Date
*	Design guide	Design for Automotive 8-Ch Class-D Amplifier With 2.1-MHz Switching Power Supply		Oct. 24, 2017

Related design resources

Hardware development

EVALUATION BOARD

TAS5404Q1EVM — 4-Ch Analog Input Class-D Audio Amp EVM w/I2C Diagnostics & Protection for Auto Head Unit

Reference designs

REFERENCE DESIGN

TIDA-00743 — Automotive 2-MHz Class-D, 4-Channel, 21-W Audio Amplifier in Class AB Form-Factor Reference Design

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