Control circuit for solid state power controller

A control circuit configured to supply a control voltage to a control terminal (G) of a solid state switching device of a solid state power controller, the solid state switching device having a first terminal (D), a second terminal (S), and the control terminal (G), the solid state switching device configured to switch between an OFF operation mode in which the second terminal (S) is electrically disconnected from the first terminal, and an ON operation mode in which the second terminal (S) is electrically connected to the first terminal (D), according to the control voltage applied to the control terminal (G);

• wherein the control circuit comprises:
• a primary controller operative to supply a primary control voltage to the control terminal (G) of the solid state switching device;
• and
• an auxiliary circuit configured to supply an auxiliary control voltage to the control terminal (G) of the solid state switching device in case the primary controller falls into an inoperative condition,
• wherein the auxiliary circuit comprises a memory unit configured to store information indicative of the primary control voltage applied by the primary controller at the time of falling into the inoperative condition,
• wherein the memory unit has the configuration of a flip-flop or latch and has a power input connected to a power supply of the primary controller,
• wherein the control circuit further comprises a charge storing unit configured to temporarily supply the memory unit with electric power when the power supply of the primary controller is cut off,
• wherein the memory unit is connected in between an output side of the primary controller and an input side of the control terminal (G), and has a data input to which the primary control voltage is supplied, and a data output connected to the control terminal (G) of the solid state switching device,
• wherein the memory unit has a clock input supplied by a clock signal indicative of control cycles of the primary controller, and the memory unit is configured to store information indicative of the primary control voltage applied by the primary controller in a previous or current control cycle, and
• wherein the memory unit has a reset input for setting the data output of the memory unit to a default value.