electronic ballasts;  trigger circuit;  The switching device heats up;  High power factor;  Self-excited control

LCC series parallel resonant conversion circuit and Buck-Boost active power factor correction circuit composed of single-tube fluorescent lamp single-stage electronic ballast, because the switching device not only has to withstand the maximum voltage of Buck-Boost active power factor correction and LCC series-parallel resonant conversion circuit, but also load input and output current, requires a trigger circuit with good performance. In this study, the diode embedding method was used to make the trigger signal cross zero, and a trigger circuit with fast rising edge, falling edge and zero crossing characteristics was obtained. The electronic ballast using this trigger circuit can reduce the turn-on and turn-off time of the switching device, reduce the switching loss, and the life of the switching device is longer, the efficiency reaches 91%, and the power factor is greater than 0.99.