Upper arm drive circuit and power conversion device

An upper arm drive circuit that drives an upper arm switching element of a power conversion circuit, the upper arm drive circuit comprising:

• a first switching element having a drain electrode connected to a gate electrode of the upper arm switching element and a source electrode connected to one main electrode on a reference potential side of the upper arm switching element;
• a second switching element having a drain electrode connected to the gate electrode of the upper arm switching element;
• a diode connected between the drain electrode of the second switching element and the gate electrode of the upper arm switching element and between the drain electrode of the second switching element and the drain electrode of the first switching element, the diode being disposed with a cathode on a side of the second switching element and an anode on a side of the upper arm switching element;
• and
• a junction field effect transistor having a drain electrode connected to a side of a source electrode of the second switching element, wherein
• the junction field effect transistor is controlled so as to be turned on in a case where the one main electrode of the upper arm switching element is 0 V or higher, and to be turned off in a case where the one main electrode is lower than 0 V.