Electronic power device with three connections and with a saturation of an insulated gate output characteristic variable inclination in a batchwise as a function of the output current

摘要

A three-terminal insulated-gate power electronic device comprises a first, bipolar power transistor (T2) and a second, insulated-gate transistor (T1) forming a darlington pair, the bipolar power transistor (T2) having a first electrode (C2), a second electrode (E2) and a control electrode (B2) respectively connected to a first electrode (D1) of the insulated-gate transistor (T1) and to a first external terminal (C) of the three-terminal device, to a second external terminal (E) of the three-terminal device, and to one second electrode (S11) of the insulated-gate transistor (T1); the three-terminal device comprises switching means (T3) connected between the control electrode (B2) and the second electrode (E2) of the bipolar power transistor (T2), and control circuit means (H;T4) connected to another second electrode (S12) of the insulated-gate transistor (T1) and controlling the swicthing means (T3) to switch them from a highly-conducting condition for low values of a current (I) flowing through the first (C) and second (E) external terminals, to a non-conducting condition for high values of the current (I) flowing through the first (C) and second (E) external terminals.