Because the number of sensor nodes is usually as many as billions, the time and cost of replacing batteries are very huge. Therefore, many wireless sensors must be able to supply power by themselves. Collecting energy from the surrounding environment has become the preferred solution, or by increasing the capacity of rechargeable storage devices to extend the interval between battery replacement, even without battery replacement. At present, there are various energy sources available, including solar energy, thermal energy and vibration energy, and even the surrounding radio frequency (RF) is used to supply energy. TI's power management equipment can support various collector, storage and load technologies in order to collect as much energy as possible from different energy sources.
In addition, the Internet of Things has also promoted the new investment of semiconductors in low-power electronic fields such as wearable devices. Although wearable devices have brought revolutionary changes to personal fitness, the different charging cables and connectors used by these micro devices have also brought many inconveniences to consumers. Wireless charging technology can not only eliminate these troubles, but also improve the overall user experience, which is one of the reasons why this technology is gradually widely adopted. According to the prediction of Credit Suisse, in the next five years, smart phones will become the "private cloud" of wearable devices, and each user will carry at least one or two such wearable products with him. Technology research company predicts that by 20 16, the wearable wireless device market will grow to 6 billion dollars.