Part 1 of this FAQ looked at the overall context of wireless charging of personal devices. This part looks in more detail at the approaches to wireless charging and the implementation specifics. Q: What approaches are available for wireless charging? A: There are three basic topologies: single-coil inductive, multi-coil inductive, and resonant. Q: What are […]
Wireless charging, Part 1: Context
Wireless charging of devices is a hot and growing area. This FAQ explores the rationale and options for implementing this form of energy transfer, storage, and charging. Q: What is wireless charging? A: It consists of two functions which are closely linked. The first is the transmission of electricals power wirelessly from a transmitting source […]
Ultra-thin RF-to-dc converter IC charges devices wirelessly
Powercast Corporation announced a smaller Powerharvester wireless power receiver and RF-to-DC converter chip (PCC114) for its Powerharvester Chipset (comprised of a wireless power receiver chip and complementary boost converter IC). Designed for embedding in space-constrained consumer designs like smart cards or hearing aids, the new chip builds on Powercast’s existing Powerharvester receiver (PCC110), which has […]
Wireless charging: Will the exception soon become the rule?
by Aishwarya Vijay, Grand View Research, Inc. If you count the number of power cords you come across each day, right from your coffeemaker in the morning to plugging in your smartphone at the end of the day, the number could well be in the double digits. What would it be like to live a […]
Powering battery-free low-power sensors, embedded circuits, wireless devices
Smart suitcases can be wirelessly tracked, they can weigh themselves, and their locks can be opened and closed by remote control. But all such luggage now depends on batteries, which run down and can also, in some cases, explode. The Face Companies of Norfolk, Virginia, announced today that they’ve solved the problem that’s been inhibiting […]
Development system for wireless power also transfers data
Würth Elektronik eiSos and Infineon Technologies AG are offering a 200-watt development system, the 760308EMP-WPT-200W, for wireless power transfer. Unique to the development kit special is that the link between the transmitter and receiver coils can be used to transfer not only power but also data. The 760308EMP-WPT-200W development kit comprises a power supply, a […]
Wireless charging products to incorporate Qi- and PMA-compliant controller
ON Semiconductor has announced a strategic collaboration with ConvenientPower Systems (CPS) whereby CPS will design, develop and market in-vehicle wireless charging solutions using ON Semiconductor’s NCV6500 application dedicated, power management controller. The combined initiative is based around a single architecture that is scalable for multiple devices and coils to 15 W. A novel and patented technique for […]
Top power electronics stories of 2017
Here are the power electronics features that got the most interest from readers in 2017. Teardown: Inside Ikea’s smart LED bulb As smart LED bulbs go, this one is pretty simple. It doesn’t incorporate any sort of smartphone app and can’t be controlled over the Internet, like some other smart bulbs […]
Wireless-charging IC juices up smartphones and tablets
The relative convenience of performing multiple tasks on your phone and tablet is often offset by the frustration of having to charge your devices sometimes multiple times a day. Consumer applications accounted for more than 55 percent of the overall wireless charging market share in 2016, according to Global Market Insights. Major smartphone manufacturers, said […]
Reference design covers no-neutral wireless wall switches for smart-home lighting
Typically, smart wall switches with wireless connectivity, occupancy/vacancy sensing and/or voice control require a neutral return wire to power the unit, which is not always available in retrofit situations. No-neutral products are available for legacy incandescent bulbs because the small AC input current that is allowed to leak through the load when the smart-switch is […]
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