Operating Circuit for an LED

摘要

The invention relates to an operating circuit for at least one LED, said operating circuit being supplied with DC voltage or with rectified alternating voltage and providing a supply voltage for at least one LED by means of a coil (L1) and a first switch (S1) clocked by a control/regulation unit (SR). When the first switch (S1) is activated energy is temporarily stored in the coil (L1) and when the first switch (S1) is deactivated said energy is discharged via a diode (D1) and via at least one LED. The control/regulation unit (SR) activates the first switch (S1) when a reactivation condition has been met, and the control/regulation unit (SR) deactivates the first switch (S1) when a deactivation condition has been met. Said reactivation condition and/or deactivation condition can be set in accordance with the current dimming level.

主权项

1. An operating circuit for at least one LED to which a DC voltage or a rectified alternating voltage is supplied and which provides a supply voltage for at least one LED by means of a coil (L1) and a first switch (S1) clocked by a control/regulation unit (SR),
wherein, when a first switch (S1) is activated, an energy is temporarily stored in the coil (L1), being discharged via a diode (D1) and via at least one LED when the first switch (S1) is deactivated, wherein the control/regulation unit (SR) activates the first switch (S1) when a reactivation condition is reached, wherein the control/regulation unit (SR) deactivates the first switch (S1) when a deactivation condition is reached, characterised in that the reactivation condition and/or the deactivation condition is adjustable dependent upon the present dimming level.