BALLAST FOR DISCHARGE LAMP

摘要

A ballast for a discharge lamp comprises a DC power supply, an inverter circuit, a load circuit, and an integrated control circuit. The integrated control circuit is adapted to control switching elements of the DC power circuit and the inverter circuit and has a first control section, a second control section, and a driver circuit. The first control section generates a first control signal for controlling the switching element of the DC power supply. The second control section generates a second control signal for controlling the switching element of the inverter circuit. The driver circuit generates a drive signal for driving the switching elements of the DC power supply and the inverter circuit according to the first and second control signals. Thus, the control circuit for controlling the DC power supply and the inverter circuit is integrated into one component, thereby decreasing the number of components mounted on a printed circuit board.