Patent ID: 8937463
Filing Date: 2015-01-20
Classification: G05F,H02M,Y02B,Y02P

Abstract:
1. A common-core power factor correction resonant converter, comprising: an energy-transforming circuit, having a first terminal, a second terminal, and a third terminal, the first terminal of the energy-transforming circuit receives an input line voltage, the second terminal of the energy-transforming circuit is coupled to a ground, the third terminal of the energy-transforming circuit generates an output power, and the energy-transforming circuit comprises a coupling inductor, a charge-storage capacitor, a switch, a first diode, and a second diode; wherein, in response to a control signal, the energy-transforming circuit charges the input line voltage to the coupling inductor and the charge-storage capacitor by a switching operation of the coupling inductor, the charge-storage capacitor, the switch, the first diode, and the second diode of the energy-transforming circuit, so as to generate a charge-storage capacitor voltage, and then in accordance with the control signal, the energy-transforming circuit enables the coupling inductor and the charge-storage capacitor to discharge and to transfer energy to an output load through the switching operation of the coupling inductor, the charge-storage capacitor, the switch, the first diode, and the second diode of the energy-transforming circuit, such that stored energy in the coupling inductor and the charge-storage capacitor is converted to the output power, wherein the coupling inductor is a common-core transformer, the coupling inductor comprises a primary side and a secondary side, a first terminal of the primary side is coupled to the first terminal of the energy-transforming circuit, wherein a second terminal of the primary side and a first terminal of the secondary side have the same polarity; a first terminal of the switch is coupled to the second terminal of the primary side, a second terminal of the switch is coupled to a second terminal of the secondary side, a control terminal of the switch receives the control signal; an anode of the first diode is coupled to the first terminal of the secondary side, a cathode of the second diode is coupled to the third terminal of the energy-transforming circuit; a first terminal of the charge-storage capacitor is coupled to the second terminal of the switch, a second terminal of the charge-storage capacitor is coupled to the ground; and an anode of the second diode is coupled to a secondary side of the charge-storage capacitor, a cathode of the second diode is coupled to a primary side of the charge-storage capacitor.