| 摘要 |
A circuit for actuating a lighting unit comprising: (120) a current mirror (T1, T2) which can be biased with a reference voltage source (D1); a hysteresis circuit (130) which is connected to the output of the current mirror (T1, T2); and a step-down converter (T3, D2, L1) with an electronic switch (T3), the electronic switch (T3) being connected to the output of the hysteresis circuit (130); wherein the lighting unit (120) can be actuated by the step-down converter (T3). |
