The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2018
Filed:
May. 26, 2016
Silicon Laboratories Inc., Austin, TX (US);
Obaida Mohammed Khaled Abu Hilal, Singapore, SG;
Silicon Laboratories Inc., Austin, TX (US);
Abstract
VCONN pull-down circuits and related methods are disclosed for USB Type-C connections. A device is connected through a USB Type-C connection to a separate device using connections including a CC (configuration channel) pin and a VCONN (connection power) pin. The device pulls down the VCONN pin to ground through a resistance (Ra) by applying the voltage on the CC pin to close a switch coupled between the VCONN pin and ground. The device can also be operated in a dead-battery mode where no supply voltage is present for the device. The device can also stop the pull-down on the VCONN pin after a connection is established, for example, using additional switches coupled to a pull-down control signal to remove the CC voltage and open the switch. The voltage on the CC pin can also be clamped to a desired voltage or voltage range using a voltage clamp.