P9225-R Datasheet

© 2018 Integrated Device Technology, Inc.

21

November 12, 2018

10. WPC Mode Characteristics

Figure 19. State Diagram for WPC Baseline Power Profile (BPP) Operation

Selection

Ping

Identification

& Configuration

Power Transfer

No response

or no power

needed

Object

detected

Power receiver

present

Error

condition

Power transfer complete

or error condition

START

10.1 Selection Phase or Startup

In the selection phase, the power transmitter determines if it will proceed to the ping phase after detecting the placement of an object. In this

phase, the power transmitter typically monitors the interface surface for the placement and removal of objects using a small measurement

signal. This measurement signal should not wake up a power receiver that is positioned on the interface surface.