| 摘要 |
A controller for a for a dimmable LED lighting circuit is disclosed, the controller comprising: an LED current controller configured to set a current of a constant current source In dependence on a conduction angle of the phase-cut dimmer; a first feedback circuit configured to control the circuit's power converter in dependence on the constant current source by adjusting an output of the power converter; and a second feedback circuit configured to control a supplementary output load arranged In parallel with the series arrangement of the constant current source and plurality of LEDs, wherein the second feedback circuit Is operable to adjust the supplementary output load faster than the first feedback circuit adjusts the output of the power convertor. A driver and lighting circuit also disclosed, as is a method for controlling a dimmable lighting circuit. |
