Two-phase paralleled switching converter, and switching circuit and control method thereof

A switching converter having an input terminal configured to receive an input voltage and an output terminal configured to provide an output voltage, the switching converter comprising:

• an energy storage circuit;
• and
• a switching circuit, comprising:
• a first switch having a first terminal and a second terminal, wherein the first terminal of the first switch is coupled to the input terminal;
• a second switch having a first terminal and a second terminal, wherein the first terminal of the second switch is coupled to the second terminal of the first switch through a first energy storage device;
• a third switch having a first terminal and a second terminal, wherein the first terminal of the third switch is coupled to the second terminal of the first switch and is coupled to the first terminal of the second switch through the first energy storage device;
• a fourth switch having a first terminal and a second terminal, wherein the first terminal of the fourth switch is coupled to the second terminal of the third switch, and the second terminal of the fourth switch is coupled to the second terminal of the second switch;
• and
• a fifth switch having a first terminal and a second terminal, wherein the first terminal of the fifth switch is coupled to the second terminal of the third switch and the first terminal of the fourth switch, the second terminal of the fifth switch is coupled to the second terminal of the second switch and the second terminal of the fourth switch through a second energy storage device;
• wherein
• the first terminal of the second switch, the second terminal of the third switch, the first terminal of the fourth switch, and the first terminal of the fifth switch are coupled to the output terminal through the energy storage circuit.

A control method for a switching converter, the switching converter having a first switch, a second switch, a third switch, a fourth switch, and a fifth switch, an input terminal configured to receive an input voltage, and an output terminal configured to provide an output voltage, the control method comprising:

• coupling a first terminal of the first switch to the input terminal of the switching converter;
• coupling a first terminal of the second switch to a second terminal of the first switch;
• coupling a first terminal of the third switch to the second terminal of the first switch and the first terminal of the second switch;
• coupling a first terminal of the fourth switch to a second terminal of the third switch, and coupling a second terminal of the fourth switch to the second terminal of the second switch;
• and
• coupling a first terminal of the fifth switch to the second terminal of the third switch and the first terminal of the fourth switch, and coupling a second terminal of the fifth switch to the second terminal of the second switch and the second terminal of the fourth switch;
• wherein
• the first terminal of the second switch, the second terminal of the third switch, the first terminal of the fourth switch, and the first terminal of the fifth switch are coupled to the output terminal through an energy storage circuit.