| 摘要 |
A switching arrangement comprising: input terminals (1) for connecting a power supply source, output terminals (4) for connection of a load, a flyback converter comprising a semiconductor switching element (T1) and a transformer (TR), a primary (PW) of which is electrically connected to one of the input terminals and a secondary winding (SW) is electrically connected to one of the output terminals (4), a control circuit for generating a switching signal (SS) to control the semiconductor switching element and means (M) for generating a control signal (S) for the control circuit (S) for the control circuit wherein the means (M) comprise a sense circuit (II) for generating a signal S1 in dependence upon the secondary winding voltage and a current-sense circuit (III) for detecting a current through the secondary winding.
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