Circuit arrangement for decoupling the output of a voltage converter

摘要

A circuit arrangement is specified for decoupling the output of a voltage converter which supplies a DC network. The voltage converter contains a controllable switch (V1) in addition to a decoupling diode (ID) on the output side. This controllable switch (V1) bridges said decoupling diode as soon as the filter capacitor (C1) of the voltage converter is at the converter required voltage. A MOSFET, for example, is used as the controllable switch, which is driven by a sensor circuit via an optocoupler (OK1a, OK1b). The bridging of the decoupling diode, which may also be the inverse diode (ID) of the MOSFET, results in the diode forward-flow losses being reduced, and the influence of the non-linearity of the diode on the value of the converter output voltage (UA) is overcome. <IMAGE>