System and method for protecting an actuating electronic system against an over-current

An electronic actuation system for an electric load, the actuation system comprising:

• a command module configured to emit an electrical command;
• a power transistor configured to be actuated by the command module by means of the electrical command, in order to modify an activation or deactivation state of the electric load;
• a control module configured to determine a control state signal as a function of the activation or deactivation state of the electric load, and to transmit the control state signal to the command module;
• a filtering module configured to apply a delay to an evaluation of the activation or deactivation state of the load by the control module, prior to determining the control state by the control module, and
• a relaxation module for protecting the actuation system against an over-current, the relaxation module being configured to generate one or more relaxation oscillations one after the other, each relaxation oscillation being produced, upon occurrence of the over-current, by:
• activating the power transistor in a linear operating mode for an activation duration, determined by the relaxation module;
• and
• opening the power transistor for a deactivation duration determined by the relaxation module the deactivation duration being consecutive to the activation duration.