Patent ID: 7994767

Claim:
A control device for integration between a direct-current (DC) power output unit and a load circuit, wherein the DC power output unit is capable of generating a DC output power for the load circuit, the control device comprising: a control signal generating module that detects the output voltage amplitude of the DC power output unit for comparison in accordance with a dual-threshold comparison scheme against a pair of preset threshold levels on each polarity of the output power, including a negative-ripple falling-edge threshold and a negative-ripple rising-edge threshold on the negative polarity, and a positive-ripple rising-edge threshold and a positive-ripple falling-edge threshold on the positive polarity, to thereby generate a first switching control signal and a second switching control signal; a first current control module having a first switching element and a first rectifying element, the first switching element responding to the first switching control signal by connecting a drive voltage to a first node, the first rectifying element connected between the drive voltage and the first node for providing a unidirectional current flow path therebetween; a second current control module having a second switching element and a second rectifying element, the second switching element responding to the second switching control signal by connecting a second node to a grounding point, the second rectifying element connected between the second node and the grounding point for providing a unidirectional current flow path therebetween; and a magnetically-coupled inductive circuit module having a first inductive element and a second inductive element, the first inductive element connected between the first node and the output node, the second inductive element connected between the second node and the output node and is magnetically coupled to the first inductive element.