40_W_RAPID_START_BALLAST

Published:2009/7/12 21:47:00 Author:May | From:SeekIC

AC line volage is rectified by diode bridge andfiltered by biode bridge and filtered by C6-L1ATransistorsQ1-Q2 with center-tapped tank coil T1A and C1- C3 make up ρower stage of 20-kHz oscillator that develops 600 V P sine wave across T1A. When fluorescent lamps ionize, current to each is limited to about 0.4 A. Lamps operate independently, so one stays on when other is removed Feedback transformer T2A supplies base drive for transistors and filamentpower forlamps Article gives transformer and choke winding data.－R J Haver,The Verdict Is In：Solid-State Fluoresce Ballasts Are Here,EDN Magazine, Nov,5,1976,p 65－69.



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