Ultra-low Standby Power Reference Design for Wireless Earbud Battery

(ACTIVE) TIDA-050007

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Key Document

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

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Bill of Materials (BOM)

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ24073  USB-Friendly Li-Ion Battery Charger and Power-Path Management IC, Vout 4.4V  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ25100A  250-mA Single Cell Li-Ion Battery Charger, 1mA termination, 75nA Battery leakage  Battery management  Sample & Buy View Design Kits & Evaluation Modules
TLV713P  150mA Low-Dropout (LDO) Regulator With Foldback Current Limit for Portable Devices   Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS61099  0.7Vin Synchronous Boost Converter with 800 nA Ultra-Low Quiescent Current  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A05  1µA, ultra-low Iq, 200mA low-dropout (LDO) regulator in a small-size package  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ24073 Download Download
TLV713P Download
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TPS61099 Download Download
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TPS7A05 Download Download
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1652 30 Apr 2018 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 755 30 May 2018 0
ZIP 1307 30 May 2018 0
PDF 434 30 May 2018 0
PDF 109 30 May 2018 0
PDF 100 30 May 2018 0
PDF 196 30 May 2018 0

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