发明申请
US20090134856A1 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

Method of optimum current blanking time implementation in current sense circuit
摘要:
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.
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