foreign object detection (wireless power) (FOD)
There are three charging profiles for wireless charging according to the Qi standard: Baseline Power Profile( BPP), Extended Power Profile( EPP) and Foreign Object Detection (FOD), which uses the BPP method as its baseline.
The FOD profile is designed to detect foreign objects that could damage the primary and secondary coils of the charging ion. These can be pieces of metal that cause damage due to eddy currents or draw too much charging power. The FOD profile is intended to detect such foreign bodies that reduce the charging power or impair the charging process.