Buck-boost circuit and control method therefor
AssigneeSpreadtrum Communications (Shanghai) Co., Ltd.
InventorYongjin Wang
Life of this patent
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Abstract
A buck-boost circuit is provided. First terminals of a first switch and a second switch are connected to an anode of the input power supply, first terminals of a third switch and a first capacitor are connected to a second terminal of the first switch, a second terminal of the third switch is connected to a cathode of the input power supply, a first terminal of a fourth switch, a second terminal of the first capacitor, and a first terminal of a first inductor are connected to a second terminal of the second switch, a second terminal of the fourth switch is connected to the cathode of the input power supply, a second terminal of the first inductor is connected to a anode of an output power supply, and a second capacitor is connected in parallel between the anode and a cathode of the output power supply.
Claims10
A buck-boost circuit, comprising a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a first inductor, a first capacitor, and a second capacitor,
- wherein a first terminal of the first switch is connected to an anode of an input power supply;
- a first terminal of the second switch is connected to the anode of the input power supply;
- a first terminal of the third switch and a first terminal of the first capacitor are connected to a second terminal of the first switch;
- a second terminal of the third switch is connected to a cathode of the input power supply;
- a first terminal of the fourth switch, a second terminal of the first capacitor, and a first terminal of the first inductor are connected to a second terminal of the second switch;
- a second terminal of the fourth switch is connected to the cathode of the input power supply;
- a second terminal of the first inductor is connected to an anode of an output power supply;
- the second capacitor is connected in parallel between the anode and a cathode of the output power supply;
- and the fifth switch is connected between the second terminal of the first capacitor and the second terminal of the second switch.
A buck-boost circuit, comprising a first switch, a second switch, a third switch, a fourth switch, a sixth switch, a first inductor, a first capacitor, and a second capacitor,
- wherein a first terminal of the first switch is connected to an anode of an input power supply;
- a first terminal of the second switch is connected to the anode of the input power supply;
- a first terminal of the third switch and a first terminal of the first capacitor are connected to a second terminal of the first switch;
- a second terminal of the third switch is connected to a cathode of the input power supply;
- a first terminal of the fourth switch, a second terminal of the first capacitor, and a first terminal of the first inductor are connected to a second terminal of the second switch;
- a second terminal of the fourth switch is connected to the cathode of the input power supply;
- a second terminal of the first inductor is connected to an anode of an output power supply;
- the second capacitor is connected in parallel between the anode and a cathode of the output power supply;
- and the sixth switch is connected in parallel with the first capacitor.
Dependencies are inferred from the claim text.