Adaptive zero-voltage switching electronic ballast

Relevant key device information applied in this article: IR2520 IRFC420 adaptive zero-voltage switching electronic ballast schematic diagram IR2520 is mainly used to drive fluorescent lamps below 40W. The rated power of the lamp is different, and the component parameters such as Q1, Q2, L2 and C7 are slightly different. For example. When the rated power of the lamp is in the range of 16-28W. Q1 and Q2 should use 500V, 2A MOSFET (such as IRFC420, etc.), the inductance value of L2 is approximately between 1.8mH and 3.5mH, and the capacity of C7 is usually 3.3nF-5.6nF. The greater the power of the lamp, the smaller the inductance value of L2, which is determined through debugging so that the lamp current is close to or consistent with the rated current of the lamp. ．