The bq51221 device is a fully contained wireless power receiver capable of operating in
both the WPC and PMA protocols which allows a wireless power system to work with both WPC and PMA
inductive charging standards. The bq51221 device provides a single device power conversion
(rectification and regulation) as well as the digital control and communication for both standards.
It also has autonomous detection of protocol and requires no additional active devices. The bq51221
device complies with the WPC v1.1 and PMA communication protocol. Together with the WPC or a PMA
primary-side controller, the bq51221 device enables a complete wireless power transfer system for a
wireless power supply solution. The receiver allows for synchronous rectification, regulation and
control and communication to all exist in a market-leading form factor, efficiency, and solution
size.