Abstract: A current detection circuit can minutely adjust characteristics when currents flowing in two directions in a current transformer are detected. The current detection circuit is configured to detect a value of a switching current through a detection resistor using a current transformer, and the value of the switching current is detected by switching the detection resistor and a reset resistor on the basis of a flow direction of the switching current flowing on a primary side of the current transformer.

Abstract: A current detection circuit capable of compensating for detection accuracy of a switching current through switching of a connection state of a resistor even when the switching current has a component in a direction opposite to a predetermined direction is provided. A current detection circuit for detecting a value of a component in a predetermined direction of a switching current using a current transformer, wherein, when the switching current flowing in a primary side of the current transformer has a component in a direction opposite to the predetermined direction, a connection state of reset elements on a secondary side of the current transformer is switched such that an impedance of a magnetic reset on the secondary side of the current transformer is decreased.

Abstract: A power conversion apparatus includes: a first power terminal; a switching circuit including a first switching device on a path coupling a first power node to a first node, a second switching device on a path coupling the first node to a second power node, a third switching device on a path coupling the first power node to a second node, and a fourth switching device on a path coupling the second node to the second power node; a transformer including a first winding coupled to the switching circuit and a second winding; a rectifier circuit; a second power terminal; and a controller that controls operations of the switching circuit and the rectifier circuit to supply power from the second power terminal toward the first power terminal during a predetermined period different from a period during which power is supplied from the first power terminal toward the second power terminal.

Abstract: A current detection circuit capable of compensating for detection accuracy of a switching current through switching of a connection state of a resistor even when the switching current has a component in a direction opposite to a predetermined direction is provided. A current detection circuit for detecting a value of a component in a predetermined direction of a switching current using a current transformer, wherein, when the switching current flowing in a primary side of the current transformer has a component in a direction opposite to the predetermined direction, a connection state of reset elements on a secondary side of the current transformer is switched such that an impedance of a magnetic reset on the secondary side of the current transformer is decreased.

Abstract: What is provided is a processing circuit capable of preventing a high voltage from being applied to a main circuit at the time of a sudden voltage change. A processing circuit includes a differentiation circuit configured to output a differential value of a change in a target voltage, a predetermined voltage output unit configured to output a predetermined voltage when the differential value output from the differentiation circuit is equal to or greater than a predetermined value, and a predetermined processing executor configured to execute predetermined processing based on a voltage output from the predetermined voltage output unit on a protection circuit having a function of performing protection on the basis of a current detected by a current detector.

Abstract: A current resonance DC-DC converter includes a transformer, a switching circuit connected to a primary winding and having a pair of first and second primary side switches which alternately perform ON and OFF operations, an AC-DC conversion circuit connected to a secondary winding and having a pair of first and second secondary side switches which alternately perform the ON and OFF operations and a control circuit that synchronously turns the switches ON and OFF in consideration of a dead time period. The dead time period is provided immediately before and after an ON period of the first and second primary switches. A lag time period is provided immediately before the dead time period. The control circuit turns the first and second secondary side switches ON at the lag time period and turns the first and second secondary side switches OFF at an expiration of the dead time period.

Abstract: A current resonance DC-DC converter includes a transformer, a switching circuit connected to a primary winding and having a pair of first and second primary side switches which alternately perform ON and OFF operations, an AC-DC conversion circuit connected to a secondary winding and having a pair of first and second secondary side switches which alternately perform the ON and OFF operations and a control circuit that synchronously turns the switches ON and OFF in consideration of a dead time period. The dead time period is provided immediately before and after an ON period of the first and second primary switches. A lag time period is provided immediately before the dead time period. The control circuit turns the first and second secondary side switches ON at the lag time period and turns the first and second secondary side switches OFF at an expiration of the dead time period.