Reverse polarity protection circuit for current load has transistor switch with inverse diode connected in load current path controlled by comparator acting as Schmitt trigger

摘要

The reverse polarity protection circuit has a transistor switch (2) and an associated inverse diode (2a) inserted in the load current path (3), controlled by a comparator (13) acting as a Schmitt trigger (7). The comparator is supplied with a voltage dependent on the load current and has an associated voltage regulator (10), regulating the difference between a positive and a negative supply voltage to a constant value. Also included are Independent claims for the following: (a) an electrical energy supply unit; (b) a rectifier circuit