Patent ID: 7257010
Filing Date: 2007-08-14
Classification: H02M

Abstract:
1. A power supply circuit comprising: a bridge circuit that has four rectifier elements connected and produces a rectified voltage between a positive side output terminal and a negative side output terminal of the power supply circuit, two of the four rectifier elements being connected to the negative side output terminal; a current detection element with which to detect a current; a first switching element that is connected in series to the current detection element and together with the current detection element is connected in parallel with one of the two rectifier elements of the bridge circuit connected to the negative side output terminal; and a second switching element that is connected in series to the current detection element and together with the current detection element is connected in parallel with the other of the two rectifier elements of the bridge circuit connected to the negative side output terminal, wherein based on a result of detecting with the current detection element, switching timings of the first switching element and the second switching element are controlled.