Resonant converter
AssigneeShenzhen Huntkey Electric Co., Ltd.
InventorWeiyin Duan
Life of this patent
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Abstract
A resonant converter includes an input terminal, an output terminal, a first switch, a second switch, a third switch, a fourth switch, a frequency controller, a resonant capacitor, a first transformer, a second transformer and a feedback circuit. The input terminal is connected to an external power supply and the output terminal is connected to an external load. The frequency controller is located on the same side as the secondary side of the first transformer and the second transformer, and the frequency controller is configured to output a first control signal to control the first switch, a second control signal to control the second switch, a third control signal to control the third switch and a fourth control signal to control the fourth switch.
Claims20
A resonant converter comprising an input terminal, an output terminal, a first switch, a second switch, a third switch, a fourth switch, a frequency controller, a resonant capacitor, a first transformer, a second transformer and a feedback circuit;
- wherein:
- the input terminal is connected to an external power supply and the output terminal is connected to an external load;
- the first switch and the second switch are connected in series between the input terminal and a ground, and a control terminal of the first switch and a control terminal of the second switch are both connected to the frequency controller;
- a common terminal connected to the first switch and the second switch is connected to one terminal of resonant capacitor;
- a second terminal of the primary side of the first transformer is connected to a first terminal of the primary side of the second transformer, and a first terminal of the primary side of the first transformer is connected to the other terminal of the resonant capacitor, a second terminal of the primary side of the second transformer is connected to the ground;
- a second terminal of the secondary side of the first transformer is connected in series with the secondary side of the second transformer, and a first terminal of the secondary side of the first transformer is connected to the ground through the third switch;
- a second terminal of the secondary side of the second transformer is connected to the ground through the fourth switch;
- a common terminal connected to the secondary side of the first transformer and the secondary side of the second transformer is connected to the output terminal;
- the feedback circuit is connected between the output terminal and the frequency controller;
- the frequency controller is located on the same side as the secondary side of the first transformer and the second transformer, and the frequency controller is configured to output a first control signal to control the first switch and a second control signal to control the second switch, based on a feedback signal output from the feedback circuit, so that the first transformer and the second transformer alternately output currents to the secondary side;
- the frequency controller is also configured to output a third control signal to control the third switch and a fourth control signal to control the fourth switch, based on a signal output from the feedback circuit.
Dependencies are inferred from the claim text.