| 摘要 |
<p>The present document relates to solid state lighting (SSL) devices. In particular, the present document relates to a driver circuit for phase-cut dimmable SSL based lighting assemblies. A control circuit (150) for a power converter (130) is described. The power converter (130) is configured to convert an input power (171) derived from a mains power supply into a drive power (175) for a light source (140). The control circuit (150) comprises a dimmer mode detection unit (157) configured to determine a first dimmer mode (187) from a plurality of predetermined dimmer modes (187), based on one or more sensor signals (181) sensed at corresponding one or more nodes of the power converter (130). The first dimmer mode (187) is indicative of whether or not the input power (171) has been derived from the mains power supply using a dimmer (110). Furthermore, the control circuit (150) comprises a state processor (158) configured to determine a first operation mode (185) of the power converter (130) based on pre-determined first state information (321). The pre-determined first state information (321) is dependent on the first dimmer mode (187). In addition, the control circuit (150) comprises a first control unit (153) configured to generate a first control signal (186) for operating the power converter (130) in accordance to the first operation mode (185).</p> |
