One of the interesting things about engineers doing wireless power design is that they often encounter technical challenges, especially when they first develop wireless power. Critical system requirements such as power dissipation and foreign object detection (FOD) create design challenges. The ability to achieve WPC compatibility, or just to ensure a good user experience, is largely determined by the components used, the type of coil, and the layout of the board.
By providing higher levels of integration, efficiency gains of up to 5%, and reducing standby power consumption to only 25mW (even during polling), the latest advances in wireless charging technology have made it easier for designers. A new two-chip solution from Texas Instruments includes the bq500511, wireless power transmitter control and the bq50002, an analog front end. The bq50002 integrates all analog functions into the system, including FETs, drivers, current sensing, voltage regulators, and demodulation filters. The bq500511 handles communication and WPC protocols. The advantage of using two chips is that it ensures that the digital components are in digital processing, while the analog components are in analog processing - which in turn creates a cost-effective solution; this solution can be used For WPC-based, or proprietary transmitters up to 5W.
To make these products easier for engineers and faster to produce, TI has provided additional development tools. These tools include a TI Designs reference design, TIDA-00623, for designing a small 5W wireless power transmitter, a design tool, bqStudio, which makes it easier for engineers to fine-tune and optimize FOD in the system.
As wireless charging technology becomes more popular and can support new features and power levels, the company's top priority will be to provide development tools such as these, making it easier to integrate wireless charging technology into different applications.
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