Semiconductor switch control device

A semiconductor switch control device comprising:

• a semiconductor switch module installed between a power supply and a load, and that transmits or shuts off a current flowing bidirectionally between the power supply and the load;
• a resistor that detects a voltage of the semiconductor switch module;
• a first voltage detector that detects a voltage applied to the resistor;
• and
• a controller configured to determine malfunction of the semiconductor switch module, based on a first detected voltage detected by the first voltage detector, wherein
• the semiconductor switch module includes
• a first semiconductor switch module, and
• a second semiconductor switch module connected in parallel with the first semiconductor switch module,
• the first semiconductor switch module includes
• a first forward switch including a body diode disposed in a forward direction serving as a direction in which the current flows, and
• a first reverse switch disposed adjacent to the first forward switch, and including a body diode disposed in a reverse direction reverse to the forward direction,
• the first forward switch and the first reverse switch include respective drain terminals connected in series, and respective source terminals, one of the source terminals being connected with the power supply, and the other of the source terminals being connected with the load,
• the second semiconductor switch module includes
• a second forward switch including a body diode disposed in the forward direction, and
• a second reverse switch disposed adjacent to the second forward switch, and including a body diode disposed in the reverse direction,
• the second forward switch and the second reverse switch include respective drain terminals connected in series, and respective source terminals, one of the source terminals being connected with the power supply, and the other of the source terminals being connected with the load, and
• the resistor includes one end connected between the drain terminals of the first forward switch and the first reverse switch, and the other end connected between the drain terminals of the second forward switch and the second reverse switch.