| 摘要 |
<p>An arrangement for driving an electronic transformer (HB) by means of a drive voltage (Vs) divided out of a RC divider circuit (R2, C9, C5). The RC divider circuit (R2, C9, C5) includes a pull-up branch (R2, C9) and a control branch (C5). Coupled to the control branch (R3, C5) there is a control switch (S2) controllable (12) to short to ground for stand-by operation of the control branch (C5) of the RC divider circuit (R2, C9, C5). The arrangement includes an energy saving switch (S1) interposed between the pull- up branch (R2, C9) and the control branch (C5) of the RC divider circuit (R2, C9, C5). The energy saving switch (S1) is actuatable to decouple the pull-up branch (R2, C9) and the control branch (C5) of the RC divider circuit (R2, C9, C5) to prevent current flow in the pull-up branch (R2, C9) of the voltage divider (R2, C9, C5) thereby avoiding power absorption therein during stand-by operation.</p> |
