The bq51010B is a family of advanced, flexible, secondary-side devices for wireless power
transfer in portable applications. The bq51010B devices provide the AC-DC power conversion and
regulation while integrating the digital control required to comply with the Qi v1.1 communication
protocol. Together with the bq50xxx primary-side controller, the bq51010B enables a complete
contact-less power transfer system for a wireless power supply solution. Global feedback is
established from the secondary to the primary to control the power transfer process using the Qi
The bq51010B devices integrate a low resistance synchronous rectifier, low-dropout
regulator, digital control, and accurate voltage and current loops to ensure high efficiency and
low power dissipation.
The bq51010B also includes a digital controller that can calculate the amount of power
received by the mobile device within the limits set by the WPC v1.1 standard. The controller will
then communicate this information to the transmitter 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 requirements under
the WPC v1.1 specification.