公开(公告)号：US20220299670A1

公开(公告)日：2022-09-22

申请号：US17681722

申请日：2022-02-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Shang-Te Yang ,  Ming-Jun Hsiao

IPC: G01V3/08

Abstract: A foreign object detection method for detecting whether a foreign object exists on a function pin of a power supplier side or a power receiver side, wherein the power supplier side and the power receiver side are coupled to each other in a detachable fashion. The foreign object detection method includes: discharging a capacitor via the function pin, wherein the capacitor is electrically connected to the function pin; providing a sensing current flowing through the function pin, to charge the capacitor; sensing a voltage variation of the function pin during a predetermined period; and comparing the voltage variation with a predetermined variation, so as to determine whether a foreign object exists on the function pin.

公开(公告)号：US11953645B2

公开(公告)日：2024-04-09

申请号：US17681722

申请日：2022-02-26

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Shang-Te Yang ,  Ming-Jun Hsiao

IPC: G01V3/08 ,  G01R19/00 ,  G01R19/165 ,  G01V3/02

CPC classification number: G01V3/088 ,  G01R19/00 ,  G01R19/165 ,  G01V3/02

Abstract: A foreign object detection method for detecting whether a foreign object exists on a function pin of a power supplier side or a power receiver side, wherein the power supplier side and the power receiver side are coupled to each other in a detachable fashion. The foreign object detection method includes: discharging a capacitor via the function pin, wherein the capacitor is electrically connected to the function pin; providing a sensing current flowing through the function pin, to charge the capacitor; sensing a voltage variation of the function pin during a predetermined period; and comparing the voltage variation with a predetermined variation, so as to determine whether a foreign object exists on the function pin.