ISOLATED INTERLEAVED DC CONVERTER
First Claim
1. An isolated interleaved DC converter, used to convert a DC input voltage into a DC output voltage in order to provide a load with power supply, comprising:
- a front-end conversion circuit, comprising a dual-phase interleaved boost circuit and a voltage-type auto charge pump circuit, wherein the dual-phase interleaved boost circuit is provided with a negative voltage terminal at an input side respectively coupling to a first active switching element and a second active switching element in parallel, a positive voltage terminal at the input side respectively coupling to a first inductor and a second inductor in parallel, and wherein the first active switching element and the first inductor which is coupled to the first active switching element in series are coupled in series to a semi-resonant circuit of the voltage-type auto charge pump circuit;
the semi-resonant circuit is coupled to one common node between the first active switching element and the first inductor and includes a third inductor and a first capacitor coupled to the third inductor in parallel;
the voltage-type auto charge pump circuit further includes a second capacitor coupled in series to the semi-resonant circuit; and
the second capacitor is coupled in parallel to a common node between the second active switching element and the second inductor; and
a transformer, wherein a primary side of the transformer is coupled to the front-end conversion circuit and to the second capacitor in parallel, a secondary side of the transformer is coupled to a rear-end conversion circuit which is electrically coupled with the front-end conversion circuit through the transformer.
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Accused Products
Abstract
An isolated interleaved DC converter has a main circuit architecture integrating a transformer, a dual-phase interleaved step-up circuit, a voltage type auto charge pump circuit with a double-voltage rectifier circuit. The circuit of the invention integrates with the transformer, and combines the dual-phase interleaved boost circuit and the voltage type auto charge pump circuit at a primary side of the transformer to reduce the input current ripple. At a secondary side of the transformer, the circuit of the invention further combines the double-voltage rectifier circuit. The active switching elements can be further integrated in the dual-phase interleaved boost circuit to realize the soft switching technology while reducing EMI and the switching loss and increasing the circuit conversion efficiency.
16 Citations
8 Claims
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1. An isolated interleaved DC converter, used to convert a DC input voltage into a DC output voltage in order to provide a load with power supply, comprising:
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a front-end conversion circuit, comprising a dual-phase interleaved boost circuit and a voltage-type auto charge pump circuit, wherein the dual-phase interleaved boost circuit is provided with a negative voltage terminal at an input side respectively coupling to a first active switching element and a second active switching element in parallel, a positive voltage terminal at the input side respectively coupling to a first inductor and a second inductor in parallel, and wherein the first active switching element and the first inductor which is coupled to the first active switching element in series are coupled in series to a semi-resonant circuit of the voltage-type auto charge pump circuit;
the semi-resonant circuit is coupled to one common node between the first active switching element and the first inductor and includes a third inductor and a first capacitor coupled to the third inductor in parallel;
the voltage-type auto charge pump circuit further includes a second capacitor coupled in series to the semi-resonant circuit; and
the second capacitor is coupled in parallel to a common node between the second active switching element and the second inductor; anda transformer, wherein a primary side of the transformer is coupled to the front-end conversion circuit and to the second capacitor in parallel, a secondary side of the transformer is coupled to a rear-end conversion circuit which is electrically coupled with the front-end conversion circuit through the transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification