| 摘要 |
The invention relates to a drive circuit for an LED, comprising a connection for a supply voltage, a rectifier and a filter circuit, a buffer element, an inductor, and a switch, wherein the inductor becomes magnetized when the switch is closed, and the inductor becomes demagnetized when the switch is open, and, at least during the phase of demagnetization, the current feeds the LED through said inductor, wherein a current detector is contained between the rectifier and the buffer element, wherein at the output of the rectifier a bypass circuit is present, which is deactivated when the current detector allows the current to flow. |
