100W Class-D audio amplifies reference design with GaN


Design files


This reference design demonstrates a Single-end Class D power stage using GaN HEMT. The design uses LMG2100R044 as power switches, the working frequency is 1MHz. 

  • Using GaN HEMT as power switches, the working frequency can promote to 2MHz or even high frequency. 
  • THD of open loop configuration is no more than 0.4%. 
  •  Peak efficiency is 94.2% @ 54.9
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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.

TIDT365.PDF (2009 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDMC48.PDF (275 K)

Detailed schematic diagram for design layout and components

TIDMC49.PDF (177 K)

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

TIDMC50.PDF (279 K)

Detailed overview of design layout for component placement

TIDMC52.ZIP (1500 K)

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

TIDCGJ2.ZIP (1588 K)

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

TIDMC51.PDF (1144 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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

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Data sheet: PDF | HTML
Gallium nitride (GaN) power stages

LMG2100R044100-V 4.4-mΩ half-bridge GaN FET with integrated driver and protection

Data sheet: PDF | HTML
Inverting buffers & drivers

SN74AC146-ch, 2-V to 6-V inverters with Schmitt-Trigger inputs

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report Discrete Single-Ended Class-D Power Stage Reference Design With GaN HEMT PDF | HTML Nov. 09, 2023

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