TIDA-00712 Reference Design

Texas Instruments

Smartwatch Battery Management Solution Reference Design

Description

This reference design is for smartwatch battery management solution (BMS). It is 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 with integrated sense resistor battery fuel gauge and a booster with output up to 28 V for LCD display devices.The design is implemented in a small size (20 mm x 29 mm) 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 5-V power supply from micro-USB connector is detected.

Features
  • Charger with buck and LDO output programmable for systemManual reset timer output for system resetWireless Receiver with 93% efficiency optimized (only one IC required)Wireless power consortium (WPC) V1.1 compatible in size of 1.9 mm x 3.0 mmFuel gauge with Impedance Track gas gauging and virtually plug-n-playBattery protection IC is a cost-effective solution for full protection of both voltage and current: charging and discharging.
Applications
  • Clinical pulse oximeter
  • Blood glucose monitor
  • Augmented reality glasses
  • Smartwatch
  • Smart trackers
Product Categories
  • Power management

Parts

Part Number Name Companion Part
BQ27421-G1 BQ27421-G1 Buy Datasheet
BQ51003 BQ51003 Buy Datasheet
CSD83325L CSD83325L Buy Datasheet

Bill Of Materials

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Schematic

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00712 Gerber 24 Nov 2015 ZIP 307
TIDA-00712 Altium 24 Nov 2015 ZIP 572
TIDA-00712 PCB 24 Nov 2015 PDF 225
TIDA-00712 Assembly Drawing 24 Nov 2015 PDF 126
TIDA-00712 BOM 24 Nov 2015 PDF 128
TIDA-00712 Schematic 24 Nov 2015 PDF 42