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Wireless charging technology has been extensively studied and implemented in the electronics industry. While it hasn't yet become mainstream, its progress in consumer electronics has shown promising results. Major smartphone manufacturers have started integrating this advanced charging feature into their flagship models. Devices like the Samsung Galaxy S6, Sony Xperia Z3+, Google Nexus 6, and Nokia Lumia 930 all support wireless charging.
The benefits of wireless power extend beyond convenience. It eliminates the need for physical connectors, improving device durability and waterproofing, which makes cleaning easier and enhances user experience. Additionally, removing touch points increases security, and the ability to transmit both power and data over challenging interfaces opens up new possibilities for innovation. Texas Instruments (TI) is a leading player in the wireless power space, offering comprehensive solutions for wearables, smartphones, automotive, industrial, and medical applications.
TI recently introduced the industry’s first fully integrated 10W wireless charging solution, featuring efficient receivers and transmitters that allow faster and more efficient charging without the need for physical connectors. The bq51025 and bq500215 are now in mass production, supporting both waterproof and dustproof designs while charging 1S and 2S lithium-ion batteries without overheating. These solutions are also compatible with any 5W Qi-compliant product on the market, making wireless charging more flexible and accessible than ever before.
The bq51025 receiver supports programmable output voltages ranging from 4.5V to 10V and, when paired with the bq500215 transmitter, achieves up to 84% charge efficiency at 10W, significantly reducing heat generation. This compact receiver measures just 3.60 mm x 2.89 mm, making it ideal for use in various portable devices such as retail scanners, handheld medical equipment, tablets, and ultrabooks.
The newly launched bq500215 is a dedicated 10W digital controller transmitter that works with 5W Qi receivers. It uses an enhanced foreign object detection (FOD) system to detect and prevent potential hazards by reducing power if excessive loss is detected.
Key features of the bq51025 and bq500215 include:
- Achieving up to 84% system efficiency at 10W, providing a fast and reliable charging experience for 1S and 2S battery-powered devices.
- Qi-compliant communication ensures compatibility with any Qi-certified 5W transmitter or receiver. The I2C interface helps align the receiver on the transmitter surface and supports proprietary data exchange.
- Both devices are designed to be compatible with future mid-power Qi-standard transmitters and receivers.
For developers, TI offers evaluation boards such as the bq51025EVM-649 Wireless Power Receiver Evaluation Kit and the bq500215EVM-648 Wireless Power Transmitter Evaluation Board. These tools help accelerate development and bring products to market faster.
As a leader in wireless power, TI provides innovative and efficient solutions not only for mobile phones and tablets but also for standalone and embedded wireless charging systems. With a broad portfolio of power ICs supporting the WPC Qi standard, TI is actively involved in industry standards organizations like the Wireless Power Consortium (A4WP) and PMA, ensuring continued leadership in wireless charging technology.