Charging and battery management remain essential features in 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 this technology. Charging systems require power-supply components—such as wall adapters—or wireless charging transmitters and receivers (like smartphones and tablets)—to be designed with high energy efficiency in mind. Focusing on these key applications, **ON Semiconductor** provides comprehensive, optimized, and energy-efficient charging solutions that meet the power needs of all these devices.
The growing demand for faster charging, larger battery capacities, and more compact chargers has pushed smartphone and tablet power requirements beyond what traditional semiconductor components can handle. Next-generation systems will need gallium nitride (**GaN**) solutions 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 technologies for wireless charging, and magnetic resonance, supported by the AirFuel Alliance, is better suited for high-power applications. For example, a laptop may require a transmitter to deliver 50 watts at 6.78 MHz, typically using a **GaN** power amplifier to build an efficient system.
AJElJallad, Senior Manager, Wireless and Wearable Strategy and Business Development, **ON Semiconductor**
At the receiving end, delivering efficient power conversion in a small footprint 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 Charge Pump Express. We continue to leverage **GaN** to develop high-density power solutions. In addition, we have a wide range of smartphone and wearable power solutions, including power and digital switches that identify and route power and data signals correctly within the system.
For magnetic resonance wireless charging systems, we offer a highly integrated power management chip capable of handling power transfer from 2W up to 50W+, with built-in system monitoring. For wireless charging receivers, we provide a variety of devices, such as full-bridge rectifiers with integrated ICs for power monitoring and conversion, capable of handling up to 20W of received power.
To help designers lead the next wave of wearable innovation, we launched the market’s first scalable next-generation wearable design platform, **WDK1.0**, featuring hardware, software, firmware, and an integrated development environment, along with a downloadable SmartApp. This platform empowers developers to create smarter, more efficient wearable solutions.
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