TIDA-010053
Low-power option for smart meter wireless module using primary cells reference design
TIDA-010053
Overview
This reference design showcases three different power architectures for smart flow meters with lithium manganese dioxide (LiMnO2) primary batteries and commercial off-the-shelf narrowband modules for Internet of Things (IoT)-related applications. The three power solutions are combined with the Battery and System Health Monitoring of Battery Powered Smart Flow Meters Reference Design hardware, which provides highly-accurate State-of-Health (SOH) calculation for the battery lifetime. The always-on in-system current monitoring detects the current peak of the RF transmission and the SOH measurement is scheduled afterwards with an adjustable delay. High-efficiency power architectures for supplying narrowband cellular modules for IoT-related applications with the BQ35100 battery gauge delivers real-time battery life data enabling on-demand battery replacement.
Features
- Accurate in-system battery gauging by utilizing the BQ35100 device capabilities
- 1 μA always-on in-system current monitoring with adjustable high and low thresholds for various power profile states with ADS7142 + LPV521
- Support for a single or two-in-series primary LiMnO2 cells
- Enables overall efficiency comparison of boost, buck, or buck-boost approach
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.
TIDUEO0C.PDF (4166 K)
Reference design overview and verified performance test data
TIDM066A.PDF (376 K)
Detailed schematic diagram for design layout and components
TIDM067A.PDF (58 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDM068A.PDF (154 K)
Detailed overview of design layout for component placement
TIDM070A.ZIP (1768 K)
Files used for 3D models or 2D drawings of IC components
TIDCFJ8A.ZIP (243 K)
Design file that contains information on physical board layer of design PCB
TIDM069A.PDF (563 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
N-channel MOSFETs
CSD13385F5 — 12-V, N channel NexFET™ power MOSFET, single LGA 0.8 mm x 1.5 mm, 19 mOhm, gate ESD protection
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | NB-IoT Power Topologies for Smart Meter Wireless Modules Using Primary Cells Ref (Rev. C) | PDF | HTML | Mar. 05, 2021 |
| Application note | Extending Battery Life with Low-Iq and Dynamic Voltage Scaling (Rev. A) | PDF | HTML | Oct. 12, 2020 | |
| Application note | How to Extend Operating Time of a LiSOCl2 Powered System | PDF | HTML | Aug. 06, 2020 |
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