High precision dc to dc converter with wide load range and gate drive circuit for use therein

A gate drive circuit is configured to comprise a first power semiconductor switching element, a second power semiconductor switching element, first to third diodes, and first to eighth resistors, and a capacitor;

• to distinguish a charge path and a discharge path of a current applied to the terminal for the turning-on/off control of the power semiconductor switching element of the switching unit,
• a gate drive signal is inputted into the current outflow terminal of the first power semiconductor switching element, and one end of the sixth resistor is connected to the current outflow terminal of the first power semiconductor switching element;
• the current outflow terminal of the first power semiconductor switching element is connected to one end of the capacitor, one end of the fourth resistor, one end of the second resistor, and the current outflow terminal of the power semiconductor switch element of the switching unit;
• the other end of the capacitor is connected to one end of the first resistor, one end of the fifth resistor, a cathode of the first diode, and a terminal for turning-on/off control of the first power semiconductor switching element;
• the other end of the first resistor is connected to one end of the second resistor;
• an anode of the first diode is connected to one end of the third resistor;
• the other end of the third resistor is connected to the other end of the first resistor;
• the other end of the fifth resistor is connected to an anode of the second diode, and a cathode of the second diode is connected to the current inflow terminal of the power semiconductor switching element of the switching unit;
• the other end of the sixth resistor is connected to an anode of the third diode;
• a cathode of the third diode is connected to the terminal for the turning-on/off control of the power semiconductor switching element of the switching unit, one end of the seventh resistor, and a current outflow terminal of the second power semiconductor switching element;
• the other end of the seventh resistor is connected to the other end of the fourth resistor and a terminal for turning-on/off control of the second power semiconductor switching element;
• and
• the current outflow terminal of the second power semiconductor switching element is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the current outflow terminal of the second power semiconductor switching element.