Single stage power factor dimming type fluorescent lamp electronic ballast design

Published:2011/9/4 20:39:00 Author:TaoXi | Keyword: Single stage, power factor, dimming type, fluorescent lamp, electronic ballast design | From:SeekIC

The frequency control means to change the fs switching frequency, so the operating frequency is away from the natural resonant frequency of the resonant network to reduce the lamp power, at this time, the duty cycle D is constantly. The duty cycle modulation means that when the fs is constantly, you change the conduction time of the switch, the reduction of the conduction time reduces the energy that is delivered to the lamp, so the power of the light reduces. The duty cycle modulation range is from 0 to 0.5, so it limits the dimming range. The DC bus voltage regulation means that you can change the amplitude value of the DC bus voltage, and keep the fs and D unchanged.



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