Power supply control device and method of controlling the same

Details Power supply control device and method of controlling the same Power supply control device and method of controlling the same

G - Physics

05

F

G05F 1/10 (2006.01) H03K 17/082 (2006.01) H03K 17/08 (2006.01)

Patent

CA 2293932

When the power supply from a power source 101 to a load 102 is controlled in a switching manner by a semiconductor switch QA, reference voltage generating means (QB, Rr) generates a reference voltage (VDSB) having a voltage characteristic substantially equivalent to that of a voltage between the terminals of the semiconductor switch QA being connected to a predetermined load. Detecting means CMP1 detects a difference between the voltage (VDSA) between the terminals of the semiconductor switch QA and the reference voltage (VDSB). Control means which consists of the gate drive 111 and CMP1 performs an an/off control of the semiconductor switch QA in accordance with the difference between the voltage (VDSA) between the terminals of the semiconductor switch and the reference voltage (VDSB).

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