Application Note
27 of 36
002-34970 Rev. **
2022-05-03
Foreign object detection tuning guide for wireless power transmitters
Applicable for WLC ICs
FOD parameter tuning
S. no.
Parameter
Description
10
EPP
5W loss characterisation coefficient ‘
b
’
Coefficient b in Equation 6 for 5W EPP mode of
power transfer. This value is auto-generated
under the cell with t
he
same name in
SystemPowerLoss_data
page.
Default value is 0.9771.
11
EPP
5W loss characterisation coefficient ‘
c
’
Coefficient c in Equation 6 for 5W EPP mode of
power transfer. This value is auto-generated
under the cell with same name in
SystemPowerLoss_data
page.
Default value is 325.95.
12
EPP 5W power loss FOD threshold (mW)
Power loss threshold for 5W EPP mode of
operation. See Case 1.
Default value is 325mW.
13
EPP 5W power loss FOD threshold no
retries and power latch (mW)
Maximum power loss threshold for 5W EPP mode
of operation. See Case 2.
Default value is 1000mW.
14
EPP 5W FOD retry count
Count for power recycle after FOD for EPP 5W
device.
Default value is 3.
15
EPP5W Power delivery retry count before
stopping power delivery
Count for power cycle after FOD for EPP 5W
device.
Default value is 3.
16
EPP loss characterisation coefficient ‘
a
’
Coefficient a in Equation 6 for 15W EPP mode of
power transfer. This value is auto-generated
under the cell with same name in
SystemPowerLoss_data
page.
Default value is 0.000003.
17
EPP loss characterisation coefficient ‘
b
’
Coefficient b in Equation 6 for 15W EPP mode of
power transfer. This value is auto-generated
under the cell with same name in
SystemPowerLoss_data
page.
Default value is 0.9625.
18
EPP loss characterisation
coefficient ‘
c
’
Coefficient c in Equation 6 for 15W EPP mode of
power transfer. This value is auto-generated
under the cell with same name in
SystemPowerLoss_data
page.
Default value is 410.14.
19
EPP power loss FOD threshold (mW)
Power loss threshold for 15W EPP mode of
operation. See Case 1.
The default value is 750mW.