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Electronic smart lock

Products and reference designs
Block diagram

Electronic smart lock

Block diagram

Overview

Electronic smart locks are growing as a result of IoT. These battery-powered locks often require features such as BLE, Sub-1 GHz, Wi-Fi connectivity, interactive RGBW HMI, audio and sensing and more. Our integrated circuits and reference designs help you address complex design issues while reducing time to market.

Design requirements

Electronic smart lock designs require:

  • Energy efficiency and long battery life with a wide operating temperature range.
  • Secure management of keys and access control.
  • Low-power HMI like RGBW LEDs, touch, proximity sensing and audio notification.
  • Support of multiple industry standards like ZigBee®, 6LoWPAN and ZigBee RF4CE remote control applications.
  • Configurable BLE advertisement intervals to reduce power consumption.

Block diagram

Find products and reference designs for your system.

Wired smart door access control

Wireless smart door access control

Wired smart door access control

Haptics Feedback Haptics Feedback Human Interface Human Interface LED Array LED Array Door Latch Door Latch Accelerometer Accelerometer Motor, LED, Audio Motor, LED, Audio Point of Load Point of Load M M Door Bolt Door Bolt Mechanical Keypad Mechanical Keypad 12V DC Input 12V DC Input Magnetics Magnetics PoE PoE RJ45 RJ45 RS232/ RS485 RS232/RS485 Fingerprint Sensor FingerprintSensor Data Data USB USB RS232/RS485 or USB RS232/RS485 or USB Energy Storage Energy Storage Battery Fuel Gauge Battery FuelGauge Battery Charger BatteryCharger ORing Controller ORingController Batteries Batteries Power Mux Power Mux Wide VIN DC/DC Power Supply Wide VIN DC/DC Power Supply Reverse Polarity Protection Reverse Polarity Protection Wide VIN DC/DC Wide VIN DC/DC TVS Protection TVS Protection Isolated DC/DC Power Supply Isolated DC/DC Power Supply MOSFET/Diode Bridge Rectifier MOSFET/Diode Bridge Rectifier PoE PD PoE PD DC/DC DC/DC MOSFET MOSFET Opto-Coupler Opto-Coupler MOSFET MOSFET Shunt Reference Shunt Reference Bridge Controller Bridge Controller Ethernet Interface Ethernet Interface Logic (Inverter Buffer) Logic (Inverter Buffer) 10/100/1000 Ethernet PHY 10/100/1000 Ethernet PHY Crystal Crystal Status LEDs Status LEDs Wired Interface Signal Input/Output Protection Wired Interface Signal Input/Output Protection ESD Protection ESD Protection ESD Protection ESD Protection ESD Protection ESD Protection Serial Interface Serial Interface RS232 Transceiver RS232 Transceiver RS485 Transceiver RS485 Transceiver OR OR Digital Processing Digital Processing MCU or Wireless MCU (With Integrated Radio) MCU orWireless MCU(With Integrated Radio) Voltage Reference Voltage Reference Voltage Translator Voltage Translator Logic Gates Logic Gates Buffer/Driver Buffer/Driver Input User Interface Input User Interface Haptics Haptics Capacitive Touch Capacitive Touch Push Button Controller Push Button Controller Signal Input/Output Protection Signal Input/Output Protection ESD Protection ESD Protection Output User Interface Output User Interface RGB & White LED Driver RGB & White LED Driver Speaker Amps SpeakerAmps Motor Driver Motor Driver Motor Driver Motor Driver Load Switch LoadSwitch Position Sensing Position Sensing Inductive Sensor Inductive Sensor Hall Effect Sensor Hall Effect Sensor Optical Sensor OpticalSensor Amp Amp Tamper Detection Tamper Detection Hall Sensor Hall Sensor Ambient Light Sensor Ambient Light Sensor Reed Switch Reed Switch Wireless Interface Wireless Interface NFC NFC Radio (BLE, Wi-Fi or Sub-1GHz) Radio (BLE, Wi-Fi or Sub-1GHz) Mobile Device Mobile Device Non-Isolated DC/DC Power Supply Non-Isolated DC/DC Power Supply Buck (or LDO) Buck (or LDO) Buck-Boost or Boost Buck-Boost or Boost

Energy storage

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A backup battery may be included in the design to provide seamless switching in case of unexpected power loss and also to supply additional current during peak load conditions. A battery management device can handle charging in systems that use a rechargeable battery. A battery gauge can be used to monitor the battery voltage.

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Battery management ICs (3)
Battery charger ICs
  • BQ25188—I2C, 1A single cell linear battery charger, 18V input, powerpath, ship mode and battery tracking
    Data sheet: PDF | HTML
  • BQ24780S—SMBus 1-4 cell Buck battery charge controller to support hybrid power boost mode
    Data sheet: PDF | HTML
Battery fuel gauges
  • BQ27426—Single cell System-side battery fuel (gas) gauge w/Pre-programmed chemistry Profile
    Data sheet: PDF | HTML
Power management (1)
Ideal diode/ORing controllers
  • LM66200—1.6-V to 5.5-V, 40-mΩ, 2.5-A, low-IQ, dual ideal diode
    Data sheet: PDF | HTML
  • PMP22125—Battery back-up switch, charger and monitor reference design
    Test report: PDF Schematic: PDF
  • TIDA-00657—SMBus 1- to 4-cell Hybrid Power Boost Mode Battery Charge Controller Reference Design
    Design guide: PDF Schematic: PDF

Technical documentation

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Type Title Date
Technical article How to create a robust building security system with TI’s SimpleLink MCU platform PDF | HTML 31 Jul 2023
Application note SimpleLink™ Wi-Fi® Enabled Electronic Smart Lock (Rev. A) 29 Sep 2020
White paper How to optimize building and home automation designs for energy efficiency 29 Apr 2020
More literature Building your application with security in mind (Rev. E) 28 Oct 2020
Technical article Making a smarter door lock with the SimpleLink™ MSP432™ microcontroller PDF | HTML 27 Jul 2023
Technical article Smart Wi-Fi® locks will soon open many doors PDF | HTML 21 Aug 2023
Application note Smart Door Lock With SimpleLink Platform 20 Jun 2018
White paper Low-Power Internet Connectivity Over Wi-Fi (Rev. A) 19 Jul 2019
Technical article Strengthening Wi-Fi security at the hardware level PDF | HTML 17 Jul 2023
White paper Connected microcontrollers essential to automation in buildings (Rev. A) 15 Apr 2021
White paper Capacitive touch building security system equipment using MSP430™ MCUs (Rev. A) 12 Dec 2024
White paper Capacitive touch building security system equipment using MSP430™ MCUs (Rev. B) 12 Dec 2024
Analog Design Journal Building a greener, more secure planet 10 Nov 2017
Application brief Dynamic Multi-protocol Manager (DMM) Tech Note (Rev. A) PDF | HTML 10 May 2022
Technical article Embrace IoT living through the gateway of electronic door locks PDF | HTML 08 Jun 2023
Technical article How to reduce board size and battery consumption in low-voltage H-bridge applicati PDF | HTML 07 Aug 2023
Product overview Electronic Smart Locks: Ultra-low power and Multi-Standard operation 05 Nov 2018
White paper Extending Battery Life in Smart E-Locks (Rev. A) 05 Jun 2020
Technical article Unlock every door with the SimpleLink™ platform PDF | HTML 05 Jul 2023
More literature SimpleLink™ Wi-Fi® CC3x20 MCU Security (Rev. A) 05 Aug 2019

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