Invention Grant
US08223465B2 Surge current detection in a switch by detecting change in a duty cycle
有权
通过检测占空比的变化，在开关中浪涌电流检测
- Patent Title: Surge current detection in a switch by detecting change in a duty cycle
- Patent Title (中): 通过检测占空比的变化，在开关中浪涌电流检测
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Application No.: US12607918Application Date: 2009-10-28
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Publication No.: US08223465B2Publication Date: 2012-07-17
- Inventor: Tom C. Truong
- Applicant: Tom C. Truong
- 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: H02H7/00
- IPC: H02H7/00 ; H02H9/02 ; H02H7/10 ; H02H7/122
Abstract:
An embodiment of the invention provides a surge current protection circuit. The surge current protection circuit comprises a peak current detector and a current sensing device. When the peak current detector detects when a surge current has occurred, by monitoring a change in duty cycle on a node of a HS (high side) switch, a LS (low side) switch is activated. The current sensing device senses the current drawn through the LS switch. When the current sensing device senses a current that exceeds a current limit, the HS switch is turned off for a period of time such that the surge current is reduced.
Public/Granted literature
- US20110096445A1 Surge Current Detection In A Switch By Detecting Change In A duty Cycle Public/Granted day:2011-04-28
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