Auxiliary power source and method for operating the auxiliary power source, as well as circuit arrangement for switching a load

摘要

An auxiliary power source (HQ) constructed with conventional components for generating an auxiliary voltage lying above the voltage of a power supply source (U 1 ), in particular for triggering an n-channel MOS transistor (T 11 ) used as a high-side switch for switching a load (I 1 ). An energy store (L 1 ) is connected via a switching element (T 1 ) to the power supply source (U 1 ) and an auxiliary voltage is generated at a power output (U 3 ).