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TIDA-00100

Indoor Light Energy Harvesting Reference Design for Bluetooth Low Energy (BLE) Beacon Subsystem

Design files

TIDA-00100

Design files

Overview

The Indoor Light Energy Harvesting Reference Design for Bluetooth Low Energy (BLE) Beacon Subsystem provides a solution where by with just the power of the typical indoor lighting in a retail environment (greater than 250 LUX) the Bluetooth Low Energy chip can broadcast BLE beacons.

This subsystem reference design is highly differentiated over existing solutions as it incorporates no batteries, thus eliminating the hassle of battery replacement, battery charging, and saving costs associated with battery maintenance.  This solution also ensures that there are no constraints around installation as long as there is typical indoor lighting available.  There is also no ON/OFF switch; the entire load connection and disconnection is handled by the power management IC therefore ensuring that the solution is self managing.

Features
  • Solar cell (Cymbet) optimized to  work in indoor lighting
  • Ultra-low power with high efficiency DC/DC boost converter/charger that manages solar cell
  • Continuous energy harvesting from low input sources: VIN ≥ 80-mV(Typical)
  • Ultra-low quiescent current: Iq < 330-nA (typ) of the power management IC and 1-uA of BLE chip
  • Cold-start voltage: VIN ≥ 330 mV (Typical)
  • Programmable dynamic Maximum Power Point Tracking (MPPT)

 

SPECIAL NOTE: The design documentation shows the CSD75205W1015 which is no longer recommended for new deisgn (NRND). The functional equivalent is the CSD75207W15.  
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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.

download Design guide — TIDA-00100
TIDU235A.PDF (1916 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00100
TIDC349.ZIP (3898 K)

Detailed schematic diagram for design layout and components

download Schematic — TIDA-00100
TIDR489.PDF (164 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00100
TIDR490A.PDF (60 K)

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

download Assembly drawing — TIDA-00100
TIDU276.PDF (199 K)

Detailed overview of design layout for component placement

download Assembly drawing — TIDA-00100
TIDU277.PDF (288 K)

Detailed overview of design layout for component placement

download Gerber file — TIDA-00100
TIDC347.ZIP (368 K)

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

download PCB layout — TIDA-00100
TIDU275.PDF (1406 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ25505 — Ultra low power harvester power management IC with boost charger, and autonomous power multiplexor

Data sheet: PDF | HTML
Low-power 2.4-GHz products

CC2541 — Bluetooth® Low Energy and proprietary wireless MCU

Data sheet: PDF
P-channel MOSFETs

CSD75207W15 — -20-V, P channel NexFET™ power MOSFET, dual Common Source WLP 1.5 mm x 1.5 mm, 27 mOhm, gate ESD pro

Data sheet: PDF | HTML

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Software

Technical documentation

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Type Title Date
* Design guide Indoor Light Energy Harvesting for BLE Beacon Subsystem Design Guide (Rev. A) Sep. 25, 2014
Technical article Energy harvesting for smarter cities Apr. 28, 2015
Technical article Energy harvesting is not new - so why isn’t everybody using it? Mar. 23, 2015

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