Device for protection against the parasitic effects caused by negative impulses of power supply voltages in monolithic integrated circuits including a power device for driving an inductive load and a control device for said power device

摘要

The device for protection against the parasitic effects caused by negative impulses of power supply voltages is applied to monolithic integrated circuits including a power device (Q3, Q4) for driving an inductive load (L) and a control device (R3, R2, Q2, Q5) with a voltage limiter (Q2, Z1) for the power device (Q3, Q4). It provides for the introduction of shielding elements (40, 70) accomplished in the form of annular pockets, of various sizes, suitable for the containment of the voltage limiter's active components.