Patent ID: 9729051
Date: 2017-08-08
CPC Classifications: G05F,H02M

Claim:
1. A power control circuit comprising: a first electrode to which a first voltage is applied; a second electrode to which a second voltage different from the first voltage is applied; a capacitor connected between the first electrode and the second electrode; a first switching element arranged between the first electrode and the second electrode and connected to a load in series; and a differential voltage monitor configured to monitor a differential voltage between the first voltage and the second voltage, and control the first switching element to be turned on and off, wherein the differential voltage monitor controls the first switching element in such a manner that in a case where the differential voltage is increased, when the differential voltage is lower than a first reference voltage, the first switching element is turned off, and when the differential voltage is equal to or higher than the first reference voltage, the first switching element is turned on, and in a case where the differential voltage is decreased, when the differential voltage is higher than a second reference voltage, the first switching element is turned on, and when the differential voltage is equal to or lower than the second reference voltage, the first switching element is turned off.