P9242-R Datasheet

© 2016 Integrated Device Technology, Inc

21

December 16, 2016

9.3

Identification and Configuration Phase

The identification and configuration phase is the part of the protocol that the power transmitter executes in order to identify the power receiver

and establish a default power transfer contract. This protocol extends the digital ping in order to enable the power receiver to communicate

the relevant information.

In this phase, the power transmitter identifies itself and receives information for a default power transfer contract as follows:



It receives the configuration packet.



If the power transmitter does not acknowledge the request (does not transmit FSK modulation), the power receiver will assume 5W

output power.

9.4

Negotiation Phase

In the negotiation phase, the power receiver negotiates changes to the default power transfer contract. In addition, the power receiver verifies

that the power transmitter has not detected a foreign object.

9.5

Calibration Phase

In the calibration phase, the power receiver provides information that the power transmitter can use to improve its ability to detect foreign

objects during power transfer.

9.6

Power Transfer Phase

In this phase, the P9242-R controls the power transfer by means of the following control data packets:



Control Error Packets



Received Power Packet (RPP, FOD-related)



End Power Transfer (EPT) Packet

Once the “identification and configuration” phase is completed, the transmitter initiates the power transfer mode. The receiver`s control circuit

sends error packets to the transmitter to adjust the rectifier voltage to the level required to maximize the efficiency of the linear regulator and

to send to the transmitter the actual received power packet for foreign object detection (FOD) to guarantee safe, efficient power transfer.

In the event of an EPT issued by the application, when the receiver sends EPT packets, the transmitter terminates the power transfer.