Description

Wearable devices require advanced power management to achieve long battery run times with always-on functionality.  Additionally: the devices need to use small rechargeable batteries and enable small footprint designs.  This application note shows the implementation of a scalable power management solution for wearables that can be tailored for activity monitors or smart watches. The design provides a wireless charging input: highly configurable battery management solution with Li-Ion battery charger and low quiescent current (Iq) DC/DC buck: boost converter for PMOLED display: boost converter for Heart Rate Monitor (HRM): and second configurable low Iq DC/DC buck.