Method and device for protecting output drivers against overloading and short circuit

摘要

In this method and device, a circuit is provided which operates at different control voltage levels and in which, in a normal situation, at least one output driver (Q31, Q41) is controlled by means of a reference value (+Vd) which is set independently of an external control (I1-I7). In a short circuit or overloading state, in contrast, the driver only receives a control voltage for short moments and the reference value begins to drop rapidly when the load count of the output driver exceeds a predetermined limit. <IMAGE>