DRIVER FOR A SOLID STATE LAMP

摘要

An electronic driver (100) for driving a solid state lamp (L) is capable of: receiving phase-cut AC supply voltage (PCACV); deriving from the phase-cut AC supply voltage dim information defining a desired dim level of the light output of the lamp; driving the solid state lamp in a dim mode at a dim level corresponding to the desired dim level as derived from the phase-cut AC supply voltage. For the purpose of deriving the dim information, the driver senses its input current. In an embodiment, the driver comprises: a controllable lamp current generator (130); a control device (140) controlling the lamp current generator; a rectifier (110) rectifying the received phase-cut AC supply voltage; a current sensor (150) sensing the output current (Ic) of the rectifier; a signal processor (160) processing the current sensor output signal and generating an input signal for the control device (140).