ENE Technology

WM1221

The WM1221 is a family of advanced, flexible, secondary-side devices for wireless power transfer in portable applications. The WM1221 devices provide the ADC conversion and control while integrating the digital control required complying with the Qi v1.1 communication protocol. Together with the WM1211 primary side controller, the WM1221 enables a complete contact-less power transfer system for a wireless power supply solution. Global feedback is established from the secondary to the primary in order to control the power transfer process utilizing the Qi v1.1 protocol. The WM1221 devices integrate a digital control, and accurate voltage and current loops to ensure high efficiency and low power dissipation. The controller will then communicate this information to the transmitter in order to allow the transmitter to determine if a foreign object is present within the magnetic interface and introduces a higher level of safety within magnetic field. This Foreign Object Detection (FOD) method is part of the new requirements under the WPC v1.1 specification.