Patent ID: 6466460
Filing Date: 2002-10-15
Classification: H02M,Y02B

Abstract:
A high efficiency power converter for generating a high voltage from a low voltage supply, the power converter comprising:a switch in electrical communication with the low voltage supply, the switch having a conduction period; a resonant capacitor in electrical communication with the switch; a resonant inductor in electrical communication with the resonant capacitor, the resonant capacitor and the resonant inductor forming a resonant circuit; a transformer in electrical communication with the resonant inductor, wherein the primary winding of the transformer is placed in parallel relation to the resonant inductor, the transformer operative to generate the high voltage supply; a current sense circuit in electrical communication with the resonant inductor, the current sense circuit operative to determine the flow of current in the resonant inductor; and a control circuit in electrical communication with the switch and the current sense circuit, the control circuit being configured to control the conduction period of the switch in response to the current flowing through the resonant inductor.