| 摘要 |
A converter circuit to produce a dc output signal from a stabilized input voltage may include a flyback inductor and a drive arrangement to drive said flyback inductor. A control unit is provided sensitive to the demagnetisation of said flyback inductor, said control unit configured to act on a first, a second and a third switch to effect in a cyclical manner the sequence including: a) producing a ramp-like increase of a magnetising current in said flyback inductor following activation of said first switch and said second switch; b) de-activating said first and second switch when the magnetising current in said flyback inductor reaches a predetermined peak value, c) activating said third switch thus producing energy transfer in said flyback inductor, and d) activating said first switch and de-activating said third switch when the voltage on said first electronic switch has reached zero.
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