Invention Grant
- Patent Title: Continuous monitoring of a USB client for battery charging specification charging capacity
- Patent Title (中): 持续监控USB客户端的电池充电规格充电容量
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Application No.: US12816259Application Date: 2010-06-15
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Publication No.: US08386814B2Publication Date: 2013-02-26
- Inventor: Steven R. Tom , Leland Scott Swanson , Roy Alan Hastings
- Applicant: Steven R. Tom , Leland Scott Swanson , Roy Alan Hastings
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent William B. Kempler; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: G06F1/00
- IPC: G06F1/00 ; G06F13/42 ; G06F13/14 ; H02J1/12 ; H02J7/00 ; G05F3/06 ; H02M7/00
Abstract:
An embodiment of the invention provides a method for continuously detecting when a USB client device may be charged according to a BCS charging standard. Power is supplied from a USB host device to the USB client device with a first current limit. Next, the USB host device monitors data lines D+ and D− for a first part of a handshake. When the first part of the handshake is detected, a second part of the handshake is provided by the USB host device indicating that the USB client device may be changed according to the BCS charging standard. All current sources and all voltage sources that are coupled to the data lines D+ and D− are decoupled from data lines D+ and D− after the handshake is complete. After the data lines are decoupled, communication may begin between the USB host device and the USB client device.
Public/Granted literature
- US20110016341A1 Continuous Monitoring of a USB Client for BCS Charging Capacity Public/Granted day:2011-01-20
Information query
