TI launches transmitter circuit for Qi wireless charging stations
Texas Instruments has introduced a wireless power transfer circuit with foreign object detection.
The device allows designers to bring to market 3-coil, 5 and 12V A6 charging stations compliant with the Wireless Power Consortium (WPC) 1.1 specification.
The bq500412 controller, which is shipping in volume production, is said to require half the components compared to other solutions.
In addition to 12V charging pads, the circuit can be combined with a boost converter to create a 3-coil, 5V USB charging pad, while taking advantage of a Dynamic Power Limit feature to ensure quality operation independent of the power capability of the port.
The bq500412 also supports an enhanced foreign object detection scheme, which makes it easier for designers to implement the requirements of the WPC1.1 specification.
