Controller for actuating a load and method for operating such a controller

A controller for actuating a load, the controller comprising:

• a first supply connection and a second supply connection;
• said first supply connection of said controller being connected to a high supply voltage potential or said second supply connection of said controller being connected to a low supply voltage potential via the load;
• a controllable switching element connected between said first supply connection and said second supply connection, said controllable switching element having a control input;
• a control unit having a control signal output connected to said control input of said controllable switching element, said control unit having a control signal connection;
• a control signal transceiver having a first connection connected to said first supply connection and a second connection connected to said control signal connection of said control unit, said control signal transceiver having a control output;
• a first voltage supply unit connected to said control signal transceiver for supplying said control signal transceiver with voltage, said first voltage supply unit having a first supply connection and a second supply connection connected to said second supply connection of the controller;
• a second voltage supply unit formed with an energy storage element, said second voltage supply unit being connected to said control unit for supplying said control unit with voltage, said second voltage supply unit having a first supply connection, a second supply connection connected to said second supply connection of the controller, and a control input connected to said control output of said control signal transceiver;
• a coil connected between said first supply connection and said controllable switching element, said coil being connected to said controllable switching element at a connection point;
• and
• a diode having an anode connected to said connection point of said coil and said controllable switching element and having a cathode connected to said first supply connection of said first voltage supply unit and to said first supply connection of said second voltage supply unit.