Dimming ballast control IC with flash suppression circuit
A technology of electronic ballasts and ballasts, applied in the direction of circuits, electric light sources, control/regulation systems, etc., can solve problems such as problems caused by electronic ballasts
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[0029] The present invention provides improvements in dimming electronic ballasts controlled to prevent lamp flicker. now refer to figure 1 , the circuit 50 is illustrated as a circuit 50 specially provided for an electronic ballast. The electronic ballast operates the fluorescent lamp 100 according to input settings and parameter selections. The electronic ballast operates with a half-bridge consisting of two switches including a high-side switch Q1 and a low-side switch Q2. Switches Q1 and Q2 are operated by electronic ballast control IC 60 in accordance with input commands and parameter settings provided by external components on control IC 60 . Control IC 60 provides ballast control and half-bridge driver within a single IC and is capable of sensing lamp power without the use of an inverter. The control IC 60 provides closed loop lamp power control and preheat current control, the preheat time and current being programmable by external components. The control IC 60 als...
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