Circuit arrangement for the parallel connection of power supply devices

摘要

The circuit arrangement is intended to be used for connecting one or more power supply devices with common loads, without significant voltage drops and/or power losses taking place. For connecting power supply devices to loads, reverse-operated MOS field-effect transistors are used as transistors, the source-drain diodes of which produce decoupling in the blocked state. The control inputs of the transistors are, in each case, connected to the output of an operational amplifier which delivers a control voltage for the extremely-low ohmic switching of the corresponding transistor when it is recognised on its inputs that the voltage across the load is less than at the output of the corresponding power supply device. Lossless connection is achieved, and fast switching-off or switching-over is guaranteed in the event of a fault.