| 摘要 |
A converter for providing a current for an LED includes: a buck diode, a buck inductor and a buck switch; and a first auxiliary switch, wherein the buck switch and the buck diode are coupled in series, wherein the buck inductor is coupled between the interconnection point between the buck diode and the buck switch, on one side, and a first output connection, on the other side. A reference electrode of the first auxiliary switch is coupled to a second node, at which a second voltage can be provided, which second voltage is correlated with the current provided to the LED, wherein the first auxiliary switch is coupled to the buck switch such that the disconnection time of the buck switch is fixed by the first voltage and the switch-on time of the buck switch is fixed by the sum of the first voltage and the second voltage.
|
