Charging and battery management remain essential features for smartphones, and they will continue to evolve for years to come. Advances in both wired and wireless charging can significantly enhance the usability of portable devices, and we are constantly pushing the boundaries of these technologies. Efficient power-supply products—such as wall adapters—and wireless charging transmitters and receivers (like those found in smartphones and tablets) must be designed with energy efficiency in mind. Focusing on these applications, **ON Semiconductor** provides comprehensive, optimized, and energy-efficient charging solutions that meet the power needs of a wide range of devices.
As the market demands faster charging times, larger battery capacities, and smaller adapters, the power requirements of smartphones and tablets have grown beyond what traditional semiconductor components can handle. Next-generation systems will rely on gallium nitride (**GaN**) technology to replace conventional MOSFETs. GaN offers higher power density in the same space, making it ideal for wall adapters and high-power wireless charging systems. There are two main wireless charging technologies, but magnetic resonance, supported by the AirFuel Alliance, is more suitable for high-power applications. For instance, a laptop might require a transmitter to deliver 50 watts at 6.78 MHz, typically using a GaN-based power amplifier to ensure an efficient system.
AJElJallad, Senior Manager, Wireless and Wearable Strategy and Business Development, **ON Semiconductor**
At the receiving end, delivering energy-efficient power conversion in a compact form factor is crucial for smartphones and wearable devices. **ON Semiconductor** offers a full range of wired and wireless charging solutions, with various integration options tailored to meet the needs of designers.
For wall adapters, we provide primary and secondary conversion products, along with power management and control solutions for major smart charging protocols such as USB PD, Qualcomm Quick Charge, and MediaTek ChargePumpExpress. We continue to leverage GaN to develop high-density power solutions. Additionally, we offer a wide range of smartphone and wearable power and digital switches, which help identify and route power and data signals correctly within the system.
For magnetic resonance wireless charging systems, we have a highly integrated power management chip capable of handling power transfer from 2W up to 50W+, including full system power monitoring. For the wireless charging receiver, we offer multiple devices, such as a full-bridge rectifier with an IC for power monitoring and conversion, capable of managing up to 20W of received power.
To support developers in creating next-generation wearable products, we launched the WDK1.0, the industry’s first scalable wearable design platform. It includes hardware, software, firmware, and an integrated development environment, along with a downloadable SmartApp, enabling designers to bring their ideas to life quickly and efficiently.
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