Abstract: A voltage converter, which is configured as a step-down converter for reducing an input direct voltage to an output direct voltage lower than the input direct voltage, includes a first step-down converter circuit arrangement, having a first semiconductor switching element with a first control input, a first coupled choke having a first freewheeling diode, and a first input capacitor and a first output capacitor. A second step-down converter circuit arrangement, includes a second semiconductor switching element having a second control input, a second coupled choke having a second freewheeling diode, and a second input capacitor and a second output capacitor. An associated control device controls the voltage converter.

Abstract: A voltage converter, which is configured as a step-down converter for reducing an input direct voltage to an output direct voltage lower than the input direct voltage, includes a first step-down converter circuit arrangement, having a first semiconductor switching element with a first control input, a first coupled choke having a first freewheeling diode, and a first input capacitor and a first output capacitor. A second step-down converter circuit arrangement, includes a second semiconductor switching element having a second control input, a second coupled choke having a second freewheeling diode, and a second input capacitor and a second output capacitor. An associated control device controls the voltage converter.

Abstract: An LLC converter having a bridge circuit coupled to an input voltage at least one pair of power switches, a resonant network, coupled to the bridge circuit and driven by power switches, an output transformer coupled to the resonant network having first and second primary side windings and a secondary side winding, a current sense transformer on the primary side in series to the resonant network and the first primary winding, an integrator circuit coupled in parallel to the second primary side winding and in parallel to the secondary side winding of the current sense transformer the transformer providing an output current of the LLC series resonant converter and a frequency adjustment controller coupled to at least one pair of power switches and the current sense transformer and the integrator circuit providing driving signals to the at least one pair power switches.

Abstract: An LLC converter, having a bridge circuit, coupled to an input voltage, comprising at least one pair of power switches, a resonant network, coupled to the bridge circuit and being driven by the at least one pair of power switches, an output transformer, coupled to the resonant network; the transformer having a first and a second primary side winding and at least a secondary side winding, a current sense transformer, coupled on the primary side in series to the resonant network and the first primary winding of the transformer, an integrator circuit coupled in parallel to the second primary side winding of the transformer and in parallel to the secondary side winding of the current sense transformer providing an integration of the voltage of the second primary side winding of the output transformer, a rectification circuit, coupled to the second primary side winding of the transformer, the transformer providing an output current of the LLC series resonant converter and a frequency adjustment controller, coupled

Abstract: A mobile electronic device includes circuitry for contactless charging. The circuitry comprises an inductor for contactlessly receiving power and supplying the power to the mobile electronic device. A control stage coupled to the inductor and is adapted to control a supply of power received by the inductor to the load to regulate a load current such that a supply voltage is maintained above a predetermined level.