Home
Design & development
Reference designs

TIDA-00757

Smart Lock Reference Design Enabling 5+ Years Battery Life on 4x AA Batteries

Design files

TIDA-00757

Design files

Overview

With the increasing number of building and home owners looking to retrofit smart locks (or electronic locks) to their building or home, wireless battery powered smart locks are becoming increasingly popular in today’s market.  In a smart lock application, the high current motor and radio often drains the battery quickly, causing battery life to suffer.  Replacing multiple batteries can be a time consuming and costly issue, and thus lowering the average current consumption is often a key design consideration.

Features
  • Over 5 years battery life on 4x AA batteries in series
    • 24 lock or unlock events per day
    • BLE radio connection period
  • Motor Driver has integrated FET’s and a current sense comparator which enables easy design and small solution size with minimal discrete components
  • Voltage-based battery gas gauge, integrated DC-DC converter
  • BLE tested using third party BLE iOS and Android applications
  • Configurable advertisement interval up to 4 seconds
??image.gallery.download_en_US?? View video with transcript Video

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-00757
TIDUBV3C.PDF (11544 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00757
TIDRMQ3A.PDF (313 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00757
TIDRMQ4A.PDF (106 K)

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

download Assembly drawing — TIDA-00757
TIDRMQ5.PDF (254 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00757
TIDRMQ7A.ZIP (1234 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — TIDA-00757
TIDCCE8A.ZIP (786 K)

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

download PCB layout — TIDA-00757
TIDRMQ6.PDF (2691 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Stepper motor drivers

DRV8833 — 10.8-V, 2-A dual H-bridge motor driver with current regulation

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS62745 — 3.3V-10V input, 300mA Ultra Low Iq step-down converter with VSEL and input voltage switch

Data sheet: PDF | HTML
ESD protection diodes

TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

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

CC2640 — SimpleLink™ 32-bit Arm Cortex-M3 Bluetooth® Low Energy wireless MCU with 128kB Flash

Data sheet: PDF | HTML
P-channel MOSFETs

CSD25310Q2 — -20-V, P channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 23.9 mOhm

Data sheet: PDF | HTML
RGB LED drivers

LP55231 — 9 channel RGB / White LED driver with internal program memory and integrated charge Pump - WQFN

Data sheet: PDF | HTML

Start development

Software

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Design guide Smart Lock Reference Design Enabling 5+ Years of Life on Four AA Batteries (Rev. C) Jun. 11, 2018
White paper Extending Battery Life in Smart E-Locks (Rev. A) Jun. 04, 2020
Technical article Power topology choices for power-hungry devices Aug. 09, 2017
Technical article Collecting environmental data with less energy and wiring May 23, 2017
Technical article Increasing battery life in IoT devices May 05, 2017
Technical article IoT is making buildings greener and more intelligent. Value versus affordability Jan. 04, 2017

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by 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, see TI support. ​​​​​​​​

Videos
Disclaimer
See the important notice and disclaimer covering reference designs and other TI resources.