Patent ID: 9655182
Date: 2017-05-16
CPC Classifications: H05B

Claim:
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 the at least one LED by means of a coil (L 1 ) and a first switch (S 1 ) clocked by a control/regulation unit (SR), wherein, when the first switch (S wherein the control/regulation unit (SR) activates the first switch (S wherein the control/regulation unit (SR) deactivates the first switch (S the control/regulation unit (SR) is configured to adjust the reactivation condition and/or the deactivation condition for the first switch (S wherein the deactivation condition is reached by monitoring a current in the operating circuit, preferably the current through a measuring resistor (Shunt, RS), and wherein below a given dimming level range, the control unit (SR) interrupts the clocking of the first switch (S