公开(公告)号：US20190312426A1

公开(公告)日：2019-10-10

申请号：US16247532

申请日：2019-01-14

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chih-Wei Mu ,  Chieh-Min Lo ,  Wei-Chung Chang

IPC: H02H7/20

Abstract: An interface control circuit includes an interface signal transceiver circuit and a protection circuit. The interface signal transceiver circuit transmits and/or receives an interface signal through a transmission interface which includes at least a first interface pin. The protection circuit includes a switch and a comparison circuit. The switch controls a conduction between the first interface pin and a signal source. The comparison circuit senses a voltage of the first interface pin, and determines whether the voltage of the first interface pin is within a threshold voltage range which corresponds to a foreign object attachment event, whereby the interface signal transceiver circuit is triggered to execute a protection operation.

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.