Hybrid power conversion system and control method

A method comprising:

• providing a hybrid dual-phase step-up power conversion system comprising a first leg and a second leg comprising a plurality of switches, a first capacitor and a second capacitor cross-coupled between the first leg and the second leg, wherein two terminals of the first capacitor are connected to the first leg and the second leg, respectively, and two terminals of the second capacitor are connected to the first leg and the second leg, respectively;
• in a first operating mode of the hybrid dual-phase step-up power conversion system, configuring the plurality of switches of the first leg and the second leg such that the second capacitor and the first capacitor are connected in series between an output of the hybrid dual-phase step-up power conversion system and ground, wherein the first capacitor is connected to ground;
• and
• in a second operating mode of the hybrid dual-phase step-up power conversion system, configuring the plurality of switches of the first leg and the second leg such that the first capacitor and the second capacitor are connected in series between the output of the hybrid dual-phase step-up power conversion system and ground, wherein the second capacitor is connected to ground.

A system comprising:

• a first leg comprising a first switch, a second switch and a third switch connected in series between an output terminal of the system and ground;
• a second leg comprising a fourth switch, a fifth switch and a sixth switch connected in series between the output terminal of the system and ground;
• a first inductor connected between an input terminal of the system and a common node of the second switch and the third switch;
• a second inductor connected between the input terminal of the system and a common node of the fifth switch and the sixth switch;
• a first capacitor connected between a common node of the fourth switch and the fifth switch, and a common node of the second switch and the third switch;
• and
• a second capacitor connected between a common node of the first switch and the second switch, and a common node of the fifth switch and the sixth switch.