China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

High-pressure sodium lamp electronic ballast, which comprises a full bridge rectifier circuit, the the passive correction circuit, a half-bridge inverter circuit, the trigger circuit, anti-sound frequency resonance circuit and a feedback circuit; the said passive correction circuit for a bi-directional self-contained complementarity circuit; triggercircuit pulse transformer L4 diode D10 in series of anti-audio resonant circuit and the output of the half-bridge inverter circuit coil connection. Wherein said high-pressure sodium lamps are connected on both ends of the anti-sound frequency resonance circuit. A feedback circuit constituted by the inductor L5 and the capacitor C4 connected in series, one end connected to the input terminal of the full bridge rectifier circuit and the half-bridge inverter circuit of the output coil. The advantages and positive effects electronic ballasts as follows: good stability, reliable performance; simple circuit structure, long service life; improve the power factor to 0.98; small start-up current and operating current.