Invention Grant
- Patent Title: VCONN pull-down circuits and related methods for USB type-C connections
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Application No.: US15165591Application Date: 2016-05-26
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Publication No.: US10067554B2Publication Date: 2018-09-04
- Inventor: Obaida Mohammed Khaled Abu Hilal
- Applicant: Silicon Laboratories Inc.
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Egan Peterman Enders Huston
- Main IPC: G06F13/40
- IPC: G06F13/40 ; G06F1/32 ; H03K17/22 ; H03K5/08 ; G06F13/42 ; H03K19/0185

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.
Public/Granted literature
- US20170344098A1 Vconn Pull-Down Circuits And Related Methods For USB Type-C Connections Public/Granted day:2017-11-30
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