Ultra-low Standby Power Reference Design for Wireless Earbud Battery


Design files


New, completely wireless earbuds are charged by the battery inside their carrying case—a unique design that requires small solution sizes and efficient power components. Additionally, the large demands in this market are increasing the need to deliver equivalent functionality more economically. This ultra-low power reference design exhibits a charging case battery and boost converter powered from USB input.

  • 18-µA ultra-low standby current
  • Supports up to 1.5 A fast charging current in the charging case
  • Supports pass-through mode when input higher than the output
  • Higher than 85% charging efficiency
  • Small solution size
  • Supports down to 1mA charging accuracy in the earbuds
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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.

TIDUEA6.PDF (1652 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRWH5.ZIP (1307 K)

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


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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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* Design guide Ultra-low Standby Power Reference Design for Wireless Earbuds Battery Charger Apr. 30, 2018

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