In a battery-powered, wireless sensing node, the biggest energy consumer typically is the RF transmitter. The transceiver should have extremely low power in active, wait and even sleep modes. A one-second snapshot of the current consumption in the various portions of the transmission cycle shows the current draw of 15 mA for the 7.5-ms receive…
Battery charger IC handles low-voltage charging of wearables, compact IoT devices
The BD71631QWZ battery charger IC from Rohm Semiconductor is designed to provide low-voltage charging of wearables (e.g., wireless ear buds) and thin, compact IoT devices (e.g., smart displays) powered by rechargeable batteries. In recent years, the need for safer, higher density rechargeable batteries has led to the development of new battery types. This includes all-solid […]
IoT PMIC uses a single inductor to power multiple rails
The new MAX77659 single-inductor multiple-output (SIMO) power management IC (PMIC) with integrated switch-mode buck-boost charger from Analog Devices, Inc. charges wearables, hearables, and Internet of Things (IoT) devices faster and in less space than any other PMIC available today. The MAX77659 SIMO PMIC delivers over four hours of playtime after a short, ten-minute charge, and […]
Boost converter, LDO ICs feature supe-low quiescent currents
Designers can now extend battery life and reduce the solution size of consumer, industrial, healthcare, and IoT systems with three new Essential Analog ICs from Maxim Integrated Products, Inc. The MAX17227A 2A nano power boost converter, the MAX17291 high voltage, 1A boost converter, and the MAX38911 500mA LDO all provide the lowest quiescent current among competitive solutions to […]
Single-/Multi-cell solar harvester increases runtime in wearable and IoT applications
Designers of space-constrained designs can now significantly increase runtime with the MAX20361 single-/multi-cell solar harvester with maximum power point tracking (MPPT) from Maxim Integrated Products, Inc. . The industry’s smallest solar harvesting solution is ideal for space-constrained applications such as wearables and the emerging internet of things (IoT) applications. Designers are often challenged with the […]
Power consumption testing for wireless IoT sensor nodes and wearables
Part one of this FAQ series focused on the various types of components available for designing power systems for wireless Internet of Things (IoT) sensor nodes, wearables, and similar applications. This FAQ focuses on measuring and validating the performance of those power systems. There are several instruments and approaches available for measuring and testing the […]
Range of rechargeable Li-ion batteries powers up wearables and hearables
The task of opening or starting a modern car is now the task of miniature computers, which are designed by car manufacturers to perform an increasing number of functions. These smart keys can do quite a lot more. For example, they provide information about the oil level, the distance that can still be traveled, the […]
Why smaller wearables warrant more powerful microbatteries
Jeffrey Ortega, ZPower Whether they’re detecting a life-threatening change in vitals or helping to manage chronic pain, wearable medical devices have the potential to enhance the quality of life and deliver advanced care to people with health issues ranging from the emergency to the long term. Wireless connectivity and Internet of Things technological advancements are resulting in…
Ultra-Low-Power battery protection IC targets wearables and small IoT devices
The GLF73510 IQSmart IC is designed to virtually eliminate wearable and IoT device battery discharge during standby or deep-sleep operation. The GLF73510 consumes an industry-leading ultra-low leakage current (ISD) of 2 nA (typ.), as much as 1,000 times less than other chips commonly used in this application. Applications for wearable and smaller IoT battery powered […]