公开(公告)号：US11146056B2

公开(公告)日：2021-10-12

申请号：US15931187

申请日：2020-05-13

Applicant: Richtek Technology Corporation

Inventor： Yu-Jen Cheng ,  Chih-Wei Mu ,  Sheng-Tsung Chen ,  Chieh-Min Lo ,  Wei-Chung Chang

IPC: H02H3/26 ,  H03K19/0175 ,  H02H1/00

Abstract: An interface control circuit complying with an interface specification includes: an interface signal transceiver circuit and a protection circuit. The interface signal transceiver circuit is coupled to a first interface connection pin and a second interface connection pin of a first interface connector circuit. The interface signal transceiver circuit is for transmitting and/or receiving an interface signal according to the interface specification. When the interface signal transceiver circuit operates under a first state, the protection circuit determines whether a foreign object exists between the first interface connection pin and the second interface connection pin according to a voltage change or a current change at the second interface connection pin. Under the first state, the interface signal transceiver circuit generates a pull-up signal and a pull-down signal which are toggled with each other at the first interface connection pin.

公开(公告)号：US20210119438A1

公开(公告)日：2021-04-22

申请号：US15931187

申请日：2020-05-13

Applicant: Richtek Technology Corporation

Inventor： Yu-Jen Cheng ,  Chih-Wei Mu ,  Sheng-Tsung Chen ,  Chieh-Min Lo ,  Wei-Chung Chang

IPC: H02H3/26 ,  H02H1/00 ,  H03K19/0175

Abstract: An interface control circuit complying with an interface specification includes: an interface signal transceiver circuit and a protection circuit. The interface signal transceiver circuit is coupled to a first interface connection pin and a second interface connection pin of a first interface connector circuit. The interface signal transceiver circuit is for transmitting and/or receiving an interface signal according to the interface specification. When the interface signal transceiver circuit operates under a first state, the protection circuit determines whether a foreign object exists between the first interface connection pin and the second interface connection pin according to a voltage change or a current change at the second interface connection pin. Under the first state, the interface signal transceiver circuit generates a pull-up signal and a pull-down signal which are toggled with each other at the first interface connection pin.