Electric arc suppression circuit of electronic ballast for fluorescent lamp

The utility model provides an electric arc suppression circuit of an electronic ballast. A locking circuit and an electric arc sampling circuit connected between an output circuit of a resonance isolated output type electronic ballast half-bridge inverter and a lamp load circuit which are connected in parallel protect an inverter oscillation stop control circuit from interference of starting-up transient current jump signals and low level signals when the inverter of a ballast starts up. An inverter oscillation starting delay circuit can effectively restrain intensity of arc discharge on the output end of the ballast. In a multi-lamp ballast, just a set of the electric arc suppression circuit is needed, and when lamps are changed under the condition that a power supply is not cut off, the electric arc suppression circuit has a restart function.