INTEGRATED TRANSMITTER-TRANSFORMER FOR WIRELESS CHARGING

Systems, methods and apparatus for wireless charging are disclosed. A charging device includes a power transmitting coil, a transformer and a driver circuit. The power transmitting coil may be configured to produce an electromagnetic flux centered on an axis that is substantially perpendicular to a plane surface of the planar magnetic core. The transformer may be located adjacent to the planar magnetic core and the driver circuit may be configured to use a stepped-up voltage received from the transformer to provide a charging current to the power transmitting coil. The transformer may include a magnetic half-core that contacts the planar magnetic core such that the planar magnetic core completes a magnetic path through the magnetic half-core.