Power Reference Design for a Wearable Device with Wireless Charging using the bq51003 and bq25120
PMP11311
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical Documents

Support & Training

Order Now


See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document

Description

Wearable devices require advanced power management to achieve long battery run times with always-on functionality.  Additionally, the devices need to use small rechargeable batteries and enable small footprint designs.  This application note shows the implementation of a scalable power management solution for wearables that can be tailored for activity monitors or smart watches. The design provides a wireless charging input, highly configurable battery management solution with Li-Ion battery charger and low quiescent current (Iq) DC/DC buck, boost converter for PMOLED display, boost converter for Heart Rate Monitor (HRM), and second configurable low Iq DC/DC buck.

Features
  • Wireless charging for ease of use
  • Configurable charger and system power management
  • Boosts for display and heart rate monitor
  • Second buck for radio or dual core MCU

See the Important Notice and Disclaimer covering reference designs and other TI resources.


  



Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

Get results faster with test and simulation data that's been verified.

Download Design Guide

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files


Parametrics
 PMP11311.1
(Output Voltage 1)
PMP11311.2
(Output Voltage 2)
PMP11311.3
(Output Voltage 3)
PMP11311.4
(Output Voltage 4)
PMP11311.5
(Output Voltage 5)
Vin (Min) (V)3.43.43.43.43.4
Vin (Max) (V)2020202020
Vout (Nom) (V)4.21.81.8512
Iout (Max) (A).3.3.3.3.1
Output Power (W)1.26.54.541.51.2
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDCDCDC
TopologyLinear RegulatorBuck- SynchronousBuck- SynchronousBoost- SynchronousBoost- Synchronous

TI Devices (6)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ25120  700nA Low Iq Highly Integrated Battery Charge Management Solution for Wearables and IoT  Battery management  Not Available Not Available
BQ25120A  700nA Low Iq Highly Integrated Battery Charge Management Solution  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ51003  BQ51003 Wireless Power Receiver  Battery management  Sample & Buy Not Available
TPS61046  28-V Output Voltage Boost Converter in WCSP Package  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS61240  5V, 400mA, 4MHz Step-Up DC/DC Converter  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS62743  2V-5.5V input, ultra-low-power 300mA to 400mA step-down buck DCDC converter with 360nA Iq  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25120 Download -
BQ51003 Download -
TPS61046 Download -
TPS61240 Download Download
Download -
TPS62743 Download -

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Datasheet (4)
Title Type Size (KB) Date
PDF 2204 30 Jul 2018
PDF 2531 03 Jun 2016
PDF 1417 03 May 2016
PDF 1057 15 Apr 2015
Application notes (2)
Title Type Size (KB) Date
PDF 254 22 Jan 2014
PDF 605 25 Jul 2013
User guides (1)
Title Type Size (KB) Date
PDF 6583 14 Apr 2016
Design files (3)
Title Type Size (KB) Date
ZIP 8502 04 Dec 2015
PDF 114 04 Dec 2015
PDF 567 04 Dec 2015
More literature (1)
Title Type Size (KB) Date
PDF 402 06 Jun 2014
Related Tools & Software

Reference Designs  ( 1 )

Name Part Number Tool Type
Small Wireless Power Transmitter for Low Power Wearable Applications  TIDA-00334  TI Designs

Software (1)



Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles