Load switch overvoltages prevention has additional overvoltage detector to signal overvoltage as soon as it occurs when switching off inductive load, control element to prevent further voltage rise

摘要

The device has additional overvoltage detection (3) and a control element (4). The overvoltage is defined to lie above the system voltage but below a permissible load switch (1) shut-off voltage. As soon as an overvoltage occurs when switching off an inductive load it is signaled by an overvoltage detector in the control circuit (4), which prevents a further rise in the voltage at the load switch.