Table of contents
Table of contents............................................................................................................................ 2
Acronyms/Abbreviations ................................................................................................................. 3
1Introduction .......................................................................................................................... 4
1.1 Document structure................................................................................................................................4
2Getting started ...................................................................................................................... 5
2.1 FOD mechanism ......................................................................................................................................5
2.1.1 FOD before power transfer ................................................................................................................5
2.1.2 FOD during power transfer ................................................................................................................7
2.1.3 FOD using pre- and in-power transfer methods ...............................................................................9
3FOD parameter tuning ...........................................................................................................14
3.1 Tuning objectives ..................................................................................................................................14
3.2 Required tools .......................................................................................................................................15
3.3 Hardware setup.....................................................................................................................................16
3.4 Q factor scaling factor tuning process..................................................................................................17
3.4.1 Q factor scaling and threshold tuning process...............................................................................18
3.4.2 Q factor-based FOD tuning ..............................................................................................................19
3.5 Resonance frequency scaling factor and threshold tuning process ...................................................20
3.5.1 Resonance frequency scaling and threshold tuning process.........................................................20
3.5.2 Resonance frequency-based FOD tuning........................................................................................23
3.6 System power loss curve coefficient tuning.........................................................................................23
3.6.1 Data collection and system loss curve coefficient calculation ......................................................23
3.6.2 Power loss-based FOD tuning..........................................................................................................25
4FOD functionality verification.................................................................................................29
5Checklist for tuning operation ................................................................................................30
Appendix I –Finding signal strength ................................................................................................31
Appendix II –Received power offset.................................................................................................32
Appendix III –Enabling UART logs using Wireless Charging Configuration Utility ..................................33
References....................................................................................................................................34
Revision history.............................................................................................................................35
