Switching converter

A switching converter, comprising:

• first input/output portions to which a first voltage is applied and second input/output portions to which a second voltage, which is lower than the first voltage, is applied;
• a switch circuit including a switch group, including n, where n is an integer that is greater than or equal to 2, switches connected in series, and a diode group, including n, where n is an integer that is greater than or equal to 2, diodes connected in series, that are connected in series between the first input/output portions;
• a first capacitor connected between the second input/output portions and connected in parallel to the switch group or the diode group;
• a second capacitor connected between the first input/output portions and connected in parallel to the switch circuit;
• a snubber circuit including snubber capacitors respectively connecting mth ones, where 1≤m≤n−1, of connection points between the switches of the switch group and connection points between the diodes of the diode group from a connection point between the switch group and the diode group;
• and
• a controller configured or programmed to turn off a gate terminal of each of the switches in the switch group;
• wherein
• the controller is configured or programmed to detect voltages at the snubber capacitors, a voltage at the first capacitor, and a voltage at the second capacitor and adjusts a time at which a gate terminal of each of the switches is turned off based on the voltages at the snubber capacitor, the voltage at the first capacitor, and the voltage at the second capacitor.

A switching converter, comprising:

• first input/output portions to which a first voltage is applied and second input/output portions to which a second voltage, which is lower than the first voltage, is applied;
• a switch circuit including first and second switch groups, each including n, where n is an integer that is greater than or equal to 2, switches connected in series, that are connected in series between the first input/output portions in order of the first switch group and the second switch group from one of the first input/output portions that is at a lower potential side;
• an inductor connected to one of the second input/output portions that is at a higher potential side and connected in series with the first switch group and the second switch group between the second input/output portions;
• a first capacitor connected between the second input/output portions and connected in parallel to the first switch group;
• a second capacitor connected between the first input/output portions and connected in parallel to the switch circuit;
• a snubber circuit including snubber capacitors respectively connecting mth ones, where 1≤m≤n−1, of connection points between the switches of the first switch group and connection points between the switches of the second switch group from a connection point between the first switch group and the second switch group;
• a controller configured or programmed to turn off a gate terminal of each of the switches in the first and second switch groups;
• and
• 2n−2 voltage-control variable capacitors respectively connected to a stage preceding the gate terminals of the 2n switches connected in the first and second switch groups excluding the switch closest to the high potential side and the switch closest to the low potential side;
• wherein
• the controller is configured or programmed to detect voltages at the snubber capacitors and a voltage at the second capacitor and adjusts a time at which the gate terminal of each of the switches is turned off based on the voltages at the snubber capacitor and the voltage at the second capacitor.

A switching converter, comprising:

• first input/output portions to which a first voltage is applied and second input/output portions to which a second voltage, which is lower than the first voltage, is applied;
• a switch circuit including first and second switch groups, each including n, where n is an integer that is greater than or equal to 2, switches connected in series, that are connected in series between the first input/output portions in order of the first switch group and the second switch group from one of the first input/output portions that is at a lower potential side;
• an inductor connected to one of the second input/output portions that is at a higher potential side and connected in series with the first switch group and the second switch group between the second input/output portions;
• a first capacitor connected between the second input/output portions and connected in parallel to the first switch group;
• a second capacitor connected between the first input/output portions and connected in parallel to the switch circuit;
• a snubber circuit including snubber capacitors respectively connecting mth ones, where 11≤m≤n−1, of connection points between the switches of the first switch group and connection points between the switches of the second switch group from a connection point between the first switch group and the second switch group;
• a controller configured or programmed to turn off a gate terminal of each of the switches in the first and second switch groups;
• 2n−2 voltage-control variable capacitors respectively connected to a stage preceding the gate terminals of the 2n switches connected in the first and second switch groups excluding the switch closest to the high potential side and the switch closest to the low potential side;
• and
• a voltage adjustment circuit that applies adjustment voltages to the 2n−2 voltage-control variable capacitors based on voltages at the capacitors.