Smartwatch Battery Management Solution Reference Design TIDA-00712 (ACTIVE)

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Key Document

Description

The TI design TIDA-00712 is a reference design for Smartwatch BMS (Battery Management Solution); It’s suitable for low power wearable devices like smartwatch applications. The design includes an ultra-low current 1 cell Li-ion linear charger; a highly integrated Qi-compliant wireless power receiver; a cost-effective voltage and current protection Integrated Circuit; a system-side(tm) with integrated sense resistor battery fuel gauge; and a booster with output up to 28V for LCD kinds of display devices.

The design is implemented in a small size (20mm x 29mm) PCB; its input power can be either from a Micro-USB connector or Qi-compliant wireless power transmitter; and the wireless power transmitter will be turned off whenever 5V power supply from Micro-USB connector is detected.

Features
  • Charger with Buck and LDO output programmable for system
  • Manual reset timer output for system reset
  • Wireless Receiver with 93% efficiency optimized (only one IC required)
  • WPC (Wireless Power Consortium) V1.1 compatible in size of 1.9mm x 3.0mm
  • Fuel gauge with Impedance Track Gas Gauging and virtually plug-n-play.
  • Battery Protection IC is the most cost-effective solution for full protection of both voltage and current, charging and discharging.

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (8)

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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
BQ27421-G1  System-Side(tm) Fuel Gauge With Integrated Sense Resistor | Battery Gas Gauge  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ2970  Li-Ion/Li Polymer Advanced Single-Cell Battery Protector IC Family  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ51003  BQ51003 Wireless Power Receiver  Battery management  Sample & Buy Not Available
CSD75208W1015  -20V, P ch NexFET MOSFET™, dual Common Source WLP 1.0x1.5, 108mOhm  MOSFETs  Sample & Buy Not Available
CSD83325L  12V, N ch NexFET MOSFET™, dual LGA, 5.9mOhm  MOSFETs  Sample & Buy Not Available
TPS61046  28-V Output Voltage Boost Converter in WCSP Package  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25120 Download -
BQ27421-G1 Download -
BQ2970 Download Download
BQ51003 Download -
CSD83325L PicoStar (YJE)| 6 Download -
TPS61046 Download -

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1494 09 Nov 2015
Design files (6)
Title Type Size (KB) Date
ZIP 307 24 Nov 2015
ZIP 572 24 Nov 2015
PDF 225 24 Nov 2015
PDF 126 24 Nov 2015
PDF 128 24 Nov 2015
PDF 42 24 Nov 2015

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