Smart lock reference design using 4 AA batteries (lifetime over 5 years)

Wireless battery-powered smart locks are becoming more and more popular in today's market with the increasing number of building and residential owners looking to retrofit smart locks (or electronic locks) for their buildings or homes. In smart lock applications, high current motors and radios often have a faster battery drain rate, resulting in compromised battery life. Replacing multiple batteries can be time-consuming and costly, so reducing average current draw is often a key design consideration.

characteristic

• ● 4 AA batteries in series provide 5+ years of battery life
  • ● 24 locking or unlocking activities per day
  • ● BLE radio connection cycle
• ● Motor driver features integrated FETs and current sensing comparators for easy design and smaller solution size with minimal discrete components
• ● Voltage-based battery fuel gauge, integrated DC/DC converter
• ● Pass BLE testing using third-party BLE iOS and Android apps
• ● Configurable advertising interval of up to 4 seconds