Invention Grant
US07868599B2 Method of optimum current blanking time implementation in current sense circuit
有权
电流检测电路实现最佳电流消隐时间的方法
- Patent Title: Method of optimum current blanking time implementation in current sense circuit
- Patent Title (中): 电流检测电路实现最佳电流消隐时间的方法
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Application No.: US11986775Application Date: 2007-11-26
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Publication No.: US07868599B2Publication Date: 2011-01-11
- Inventor: Md Abidur Rahman , Huijuan Li , Brett E. Smith , Zheng Li
- Applicant: Md Abidur Rahman , Huijuan Li , Brett E. Smith , Zheng Li
- 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: G05F1/00
- IPC: G05F1/00

Abstract:
In a method and system for sensing current in a switching regulator (SWR) operating in a current mode, a power switch is coupled to receive the current from a switching element, the power switch being controlled by a gate signal. An inrush of the current causes an initial transient spike (ITS). A buffer having a buffer input and a buffer output is coupled to receive the gate signal and provide a buffered gate signal. The buffer output is disabled during the ITS. A sense switch (SW) is coupled to receive a portion of the current from the switching element, the SW being turned on by the buffered gate signal after the initial transient spike. A sense resistor (SR) is coupled to receive the portion of the current from the SW. An amplifier converts the portion of the current through the SR to a voltage signal for controlling the SWR.
Public/Granted literature
- US20090134856A1 Method of optimum current blanking time implementation in current sense circuit Public/Granted day:2009-05-28
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