Single switch electronic ballast with low in-rush current

摘要: An electronic ballast (200) includes a rectifier circuit (20), clamp inductor (44), an switch (62), control (60) for driving the energy storage capacitor (34), first diode (38), second (50), clamping (58), and output (80). In preferred embodiment, (20) full-wave bridge (22) high frequency filter (24), (80) has resonant (82), (92), DC blocking (98). The provides power factor correction, low in-rush current, fluorescent lamps, but requires only single (62) (44).