The demand for smartwatches and smart band devices is growing every year with more and more consumer electronics companies as well as lifestyle brands dipping their toe in this market segment. Along with a core set of smart features like gathering activity information, syncing with the user’s smartphone for a seamless notification experience and providing navigation, brands are adding more functionalities to their products in order to differentiate themselves from the competition and enable consumers with new use cases.
These advancements in technology and addition of new features is great from the perspective of smart band functionality but has a detrimental effect on the battery lifetime of the device. The size of an average watch has remained virtually unchanged over decades which leaves less and less space for the battery when manufacturers try to implement more features often requiring additional electronic components. We have gone from watches that could last many years between battery replacements to smart watches of today which need to be charged every night.
This fundamental problem can be addressed with energy harvesting from sources like hand movement and ambient light. Due to the extreme space constraint in smart bands and smartwatches, Nexperia’s ultra small energy harvesting PMIC has a clear advantage over other energy harvesting chipsets in the market. NH2 also has the fastest MPPT response time which enables the system to harvest the maximum amount of energy from the frequently changing ambient source. More information about energy harvesting smart bands using our PMIC can be found in the application note
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