TIDA-00318

Qi (WPC) Compliant Wireless Charger for Low Power Wearable Applications

TIDA-00318

Design files

Overview

This reference design is suitable for low power wearable devices including a Qi-compliant wireless receiver (bq51003) and ultra-low current 1-cell Li-ion linear charger (bq25100). It features an ultra-small size (5 x 15 mm2), capable of low-charging currents down to 10 mA and up to 250 mA with support of termination currents as low as 1 mA.  This design is for 135-mA charge current applications.

Features
  • Small size: 5 x 15 (mm2)
  • Adjustable charging current: 10 ~ 250 (mA)
  • Supports 1-mA charge termination currents
  • <75-nA battery-leakage current

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.

TIDRAA3.PDF (139 K)

Detailed schematic diagram for design layout and components

TIDRAA4.PDF (199 K)

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

TIDRAA5.PDF (238 K)

Detailed overview of design layout for component placement

TIDRAA6.PDF (29 K)

Detailed overview of design layout for component placement

TIDRAA8.ZIP (192 K)

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

TIDC590.ZIP (92 K)

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

TIDRAA7.PDF (22 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ25100Standalone 1-cell, 250-mA linear battery charger with 4.2-V charge voltage and prog. pre-charge

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery charger ICs

BQ25100AStandalone 1-cell, 250-mA linear battery charger with 4.3-V charge voltage and prog. pre-charge

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery charger ICs

BQ25100HStandalone 1-cell, 250-mA linear battery charger with 4.35-V charge voltage and prog. pre-charge

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery charger ICs

BQ25101Standalone 1-cell 250-mA linear battery charger, 4.2-V charge voltage and charging status indication

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery charger ICs

BQ25101HStandalone 1-cell 250-mA linear battery charger with 4.35-V charge voltage & charging indication

Data sheet document-pdfAcrobat PDF open-in-new HTML
Battery charger ICs

BQ51003BQ51003 Wireless power Receiver

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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View all 2
Type Title Date
Technical article Giving the gift of wearables this holiday? Don’t forget to look at the battery charger! Dec. 10, 2014
User guide TIDA-00318 Test Results Aug. 27, 2014

Related design resources

Hardware development

EVALUATION BOARD
BQ25100EVM-654 Battery Charge Solution for Single-Cell Li-Ion Battery-Powered Systems Evaluation Module

Support & training

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