 A new control IC, the L6585, has been designed to manage electronic ballasts for fluorescent lamps; it includes both Power Factor Correction and half-bridge sections and embeds a wide range of features to provide an energy saving and cost effective solution.
The high-voltage single chip approach optimizes the management of lamp critical conditions like start-up (pre-heating and ignition), fault and lamp replacement. In fact, the internal logic is able to carry out all of these phases being steered by precise internal references and timings.
The PFC section has superior performance in terms of harmonic content mitigation. High Power Factor (PF) and Total Harmonic Distortion (THD) reduction are obtained as required by international norms, especially in case of Universal input voltage operation.
Particular care has been dedicated to pre-heating and ignition phases prior to lamp starting, in order to ensure the proper filament warming up and extend lamp life.
Innovative circuitry allows an improved control of the lamp voltage during ignition as well protection against failures due to lamp ageing.
The use of this new control IC simplifies the industrialization of electronic ballasts increasing the application reliability and reducing its dimensions and cost.
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