| 摘要 |
In a first aspect the invention provides an LED converter for providing power to a LED string comprising at least one LED, comprising a resonant converter with a switching regulator, preferably a clocked half-bride converter, a galvanic barrier, the primary side of which being supplied by the switching regulator and the secondary side of which being arranged for providing directly or indirectly power to the LED string, a control circuit on the primary side of the galvanic barrier and which is adapted to sense an averaged value of an primary side electric parameter indicative, of a current supplied to the LED string on the secondary side of the galvanic barrier and wherein the control circuit is adapted to control a switching frequency of switching regulator switches, in particular switches of the clocked half-bridge, based on the sensed averaged value of the primary side electric parameter to control the current supplied to the LED string, wherein the control circuit preferably receives no feedback signal from the secondary side of the galvanic barrier. |
