Direct current converter

A direct current converter, wherein the direct current converter comprises a first BUCK circuit, a second BUCK circuit, a charge pump circuit, a drive circuit, a controller, and a power conversion circuit;

• an input end of the first BUCK circuit is configured to connect to a photovoltaic module;
• an output end of the first BUCK circuit is connected to an input end of the second BUCK circuit, an input end of the charge pump circuit, and a first power supply end of the drive circuit;
• an output end of the charge pump circuit is connected to a second power supply end of the drive circuit;
• an input end of the power conversion circuit is configured to connect to the photovoltaic module;
• an output end of the power conversion circuit is configured to connect to an inverter;
• a direct current output by the power conversion circuit is converted into an alternating current via the inverter, and the alternating current is connected to a power grid;
• a control signal input end of the drive circuit is connected to the controller;
• a drive signal output end of the drive circuit is connected to a control end of the power conversion circuit;
• and
• the direct current converter is configured to implement maximum power point tracking of the photovoltaic module, wherein
• the first BUCK circuit is configured to provide a first power supply for the drive circuit, and provide a power supply for the charge pump circuit;
• the charge pump circuit is configured to provide a second power supply for the drive circuit;
• and
• the second BUCK circuit is configured to provide a power supply for the controller.