Adaptive zero voltage switching electronic ballast schematic diagram: IR2520 is mainly used for driving the fluorescent 40W or less. Rated lamp power different, Q1, Q2, L2 and
C7 components such parameters are slightly different. E.g. When the lamp rated power in the 16-28W range. Q1 and Q2 should use 500V, 2A of the MOSFET (eg IRFC420 etc.), L2 inductance values between about 1.8mH and 3.5mH, C7 capacity usually 3.3nF-5.6nF. Lamp greater the power, the inductance value L2 of the smaller, specific debugging determined by the lamp current close to or in line with the rated lamp current.