Elektronisches Schaltnetzteil zur Speisung eines Akkumulators

摘要

An electronic combinatorial circuit component for feeding an accumulator (61) consists of a self-oscillating flyback converter with a transformer (50), a switching transistor (1) with an emitter state (22) and a feedback circuit (11, 27). A control circuit (St) blocks the switching transistor (1) when a predetermined upper switching voltage (A) is reached at the accumulator (61). A switching device (SE) reduces the upper switching voltage (A) to a lower switching voltage (B) when, with the combinatorial circuit component in pulsed operation, the ratio between the duration of the oscillation pauses and that of the oscillation bunches exceeds a certain level.