Patent ID: 7944716

Claim:
A resonant converter for supplying electrical energy from a supply source (Vs) to a load, the resonant converter comprising first and second series-arranged controllable switches to be connected between supply source terminals, a control device (CL) for generating control signals for opening and closing the first and second switches, a resonant tank in electrical connection with the first and second switches, the resonant tank comprising a resonant capacitor (Cr), wherein one of the first and second switches is turned on and a current flowing in the resonant tank is monitored and a voltage at a predetermined point in the resonant tank is monitored, a first conduction interval occurs while the first switch is turned on and a second conduction interval occurs while the second switch is turned on, and wherein two control parameters are set for the first conduction interval and two are set for the second conduction interval, the control parameters for the two conduction intervals being: a peak current of the interval and a predetermined voltage of the interval, and wherein the first and second switches are turned off in accordance with criteria including the four control parameters.