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Transmitter
LED Indications
The table below shows the default state of the dual-color LED for various operating conditions of the
3
PAC5220WP EVK.
Condition
Searching for receiver/Idle
(WPC selection state)
Power Transfer
Power Limited Operation
Over-Voltage
Over-Temperature
FOD detected
Over-current on ISENSE
End Power Transfer:
Charge Complete, Battery
Failure or Internal Fault
End Power Transfer: No
response
End Power Transfer:
Reconfigure
End Power Transfer: any
other type (except
Reconfigure)
Note that for certain End Power Transfer message types (charge complete and reconfigure), if three of
these messages are received in a row, then the PAC5220WP will terminate charge and wait until the
device has been removed from the charge pad before resuming charging (as specified in the Low-Power
specification).
3
Note that the LED behavior of this application is customer configurable.
© 2014 Copyright, Active-Semi International, Inc.
No portion of this document may be reproduced or reused in any form without Active-Semi's prior written consent
LED
LED
Recovery
(green)
(red)
Off
Off
n/a
On
Off
n/a
On
On
Remove receiver from charge pad.
Off
Off
Removes power and waits until voltage drops below
threshold before charging receiver. LEDs revert to
idle state (off by default).
Off
On
Both temperature drops below over-temperature
hysteresis value and 5 minutes elapse.
Off
On
Wait for removal of receiver and immediately reset,
or wait 15 seconds and reset – whichever comes
first.
Off
On
Latch off
On
On
Reset state machine after 5 seconds.
On
On
Wait for removal of receiver from charge pad and
immediately reset.
On
Off
n/a (charging does not stop)
On
On
Reset state machine after 2 seconds.
PAC5220WP A11 WPC
Power Application Controller
- 20
-
Rev 1.7 May, 2014
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