Fluorescent lamp electronic ballast

Published:2011/8/14 22:45:00 Author:Ecco | Keyword: Fluorescent lamp, electronic ballast | From:SeekIC

The fluorescent lamp electronic ballast circuit is composed of the rectifier filter circuit, high-frequency oscillator circuit and output circuit, and it is shown in Figure 3-202. Rectifier filter circuitis composed of the rectifier diodes VDl-VD4 and filter capacitors Cl, C2. High-frequency oscillator consists of the transistors VI, V2, resistors Rl-R7, capacitors C3, C4, C6, diodes VD5-VD8 and inductors L3-L5 (L3-L5 is wound in the same magnetic ring to form a high-frequency transformer). Output circuit consists of the chokes Ll, L2 (stabilizing current) and capacitors C7-ClO. Rl-R7 use 1/4W carbon film resistors or metal film resistors.



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