Digitally DALI Dimming Ballast

Posted on Sep 29, 2012

A complete digital dimming system includes the dimming ballasts and a digital control unit for converting information from an Ethernet connection to the communication protocol required by the micro-controller in each ballast (Figure 1). Applications for this system include building management or studio lighting where it is desired to control single or groups of lamps for conserving energy, performing lamp maintenance or creating precision lighting effects.

Digital dimming ballasts include an EMI filter, rectifier, power factor correction, and ballast output stage (Figure 2). The digital ballast also includes a micro-controller for sending and receiving information digitally. The microcontroller function

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