| 摘要 |
<p>A device for controlling power supply towards at least one light source (L1, L2, L3, L4), for example a LED, comprising a load (L) having a value variable as a result of switching of at least one switch (S1, S2) coupled thereto, includes:
- a power supply set (12, 14) controllable to determine the intensity (Iout) of the current fed towards said load (L),
- a current feedback loop (16, 18, 20) sensitive to the intensity (Iout) of the current fed towards said load (L), said current feedback loop being connected (34) to said power supply set (12, 14) to maintain the intensity (Iout) of the current fed towards said load (L) upon variation of said load (L), and
- a voltage control (30, 32) sensitive to the voltage across said load (L), said voltage control likewise connected (34) to said power supply set (12, 14) to maintain the intensity (Iout) of the current fed towards said load (L) upon variation of said load (L).</p> |
