Patent ID: 8587963
Filing Date: 2013-11-19
Classification: H02M,Y02B

Abstract:
1. A resonant converter equipped with a phase shifting output circuit, comprising a resonant circuit to receive input power and regulate to become at least one resonant power, a switch unit to switch an ON period for the input power to pass through the resonant circuit, and a power transformation circuit to regulate the resonant power and output a transformed power; the resonant circuit including a resonant capacitor, a resonant inductor and a parallel inductor parallel bridging the resonant inductor and the power transformation circuit, wherein the resonant converter further includes: a resonant control unit to generate a resonant control signal; a pulse width modulation unit to regulate the resonant control signal to become a pulse form control signal; an ancillary winding through which the pulse form control signal is sent to the switch unit; a driver to provide power to drive the switch unit and to enable control of the switch unit by the resonant control signal generated by the resonant control unit to control the passing period of the input power; a primary output circuit which is connected to the power transformation circuit to regulate the transformed power with a synchronous rectification unit to become a primary output power, the resonant control unit being electrically connected to the primary output circuit to capture a feedback signal and generate the resonant control signal, the synchronous rectification unit being controlled based on the resonant control signal; and at least one secondary output circuit which is connected to the power transformation circuit to receive the transformed power and has a bridge rectification unit and a phase shifting control unit; the phase shifting control unit being electrically connected to the resonant control unit to receive the resonant control signal and regulate to become a phase shifting driving signal, the bridge rectification unit being controlled by the phase shifting driving signal to regulate the transformed power to become a secondary output power.