Ultra-low Standby Power Reference Design for Wireless Earbud Battery
TIDA-050007
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Key Document
- Ultra-low Standby Power Reference Design for Wireless Earbuds Battery Charger
(PDF 1652 KB)
30 Apr 2018
Description
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.
Features
- 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
See the Important Notice and Disclaimer covering reference designs and other TI resources.