Application Note
30 of 36
002-34970 Rev. **
2022-05-03
Foreign object detection tuning guide for wireless power transmitters
Applicable for WLC ICs
Checklist for tuning operation
5
Checklist for tuning operation
1.
Use caution while moving the TPR toward the interface surface of the transmitter. Ensure that the
movement is subtle and does not lead to any mechanical or electrical damage to the transmitter or
receiver.
2.
Ensure proper EMI discharge for the test equipment.
3.
Ensure the power levels of the TPR are within the range of the expected current loads during load ramp
tests.
4.
Ensure best possible signal strength alignment between TPR and transmitter. Refer to
finding the best signal strength.
5.
Ensure proper offset values are considered while tuning the power loss FOD parameters. Refer to
for more details.
6.
Ensure that no FO is present on the interface surface, or in the vicinity (field of influence) of the
transmitter coil.
7.
Ensure the FOD functionality is appropriately enabled before verifying the design using section
8.
Ensure the FO temperature is monitored and appropriate actions are taken to avoid damage to Rx and
Tx.
9.
Ensure that the Debug prints are set to default after the tuning operation is complete.
10.
validates FOD functionality. To ensure complete Qi compliance, it is recommended to execute
the compliance test in