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TIDA-00733
Automotive 8-Channel Class-D Amplifier with 2.1 MHz Switching Power Supply Reference Design
TIDA-00733
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
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.
TIDUCZ2.PDF (7883 K)
Reference design overview and verified performance test data
TIDRUQ7.PDF (850 K)
Detailed schematic diagram for design layout and components
TIDRUQ8.PDF (42 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRUQ9.PDF (486 K)
Detailed overview of design layout for component placement
TIDRUR1.ZIP (2228 K)
Files used for 3D models or 2D drawings of IC components
TIDCEA5.ZIP (5557 K)
Design file that contains information on physical board layer of design PCB
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 | HTMLAudio ADCs
PCM1865-Q1 — Automotive 110dB 4-Channel Software-Controlled Audio ADC With Universal Front End
Data sheet: PDF | HTMLGeneral-purpose op amps
TLV2462A-Q1 — Automotive-grade, dual, 6-V, 6.4-MHz, 1.5-mV offset, RRIO operational amplifier
Data sheet: PDF | HTMLIdeal diode/ORing controllers
LM74610-Q1 — 0.48-V to 42-V, zero IQ automotive ideal diode controller
Data sheet: PDF | HTMLMSP430 microcontrollers
MSP430G2332-EP — Enhanced product Mixed Signal Microcontroller
Data sheet: PDFNoninverting buffers & drivers
SN74LVC125A-Q1 — Automotive four-channel 1.65V-to-3.6V buffers with 3-state outputs
Data sheet: PDF | HTMLSpeaker 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 | HTMLStart development
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
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