The advantage of having a digital solution, with the use of a dedicated microcontroller, is given by the possiblity to manage lamps with different power levels keeping the same circuit architecture. Two different approaches can be implemented:

  • Full digital ballasts are completely managed by a microcontroller. The microcontroller manages both the high-voltage half bridge driver to manage the lamps and the low-voltage driver for the PFC pre-regulation.
  • A mixed digital ballast, where the microcontroller manages only a section of the ballast, usually the half bridge section, while for the PFC section an analog PFC controller is used.

Design

Technical Documentation

Application Notes
Description Version Size
AN2640 AN2640: Intelligent multipower digital ballast for fluorescent lamps 1.3 1 MB



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