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In the current mode PWM control DC-DC converter, the current detection module is an important part of the current loop, used to detect the current flowing through the power tube and the inductor, and by making the current detection result and the output of the voltage loop Compare and realize the effect of pulse width modulation. In voltage mode PWM control DC-DC converter, LDO, Charge Pump and other circuits, it can also be used for energy saving and protection purposes such as open circuit, short circuit, over current. This article describes a new type of current sensing circuit for switching regulators.
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