CONTROL CIRCUIT FOR A SEMI-CONDUCTOR POWER ELEMENT AND APPLICATION TO A BURNER SAFETY DEVICE

The invention relates to a control circuit for a semi-conductor power element, comprising a circuit generating a signal synchronous with the variable current supply signal of the semi-conductor power element, and a logic circuit with high input impedance to receive directly, on the one hand, the said synchronous signal and, on the other hand, the low strength detection signal and which is such that the delay circuit is combined to the high input impedance logic circuit to prevent the production of control pulses on the electrode controlling the semi-conductor or power element, if one of the components of the control circuit should become faulty. The invention finds an application in burner control and safety devices.