Microcontroller, switched-mode power supply, ballast for operating at least one electric lamp, and method of operating at least one electric lamp

摘要

The invention relates to a microcontroller (MC) having at least one device (G) for generating pulse-width modulated or frequency modulated control signals for a switched-mode power supply. The device (G) has a further device (SQ1, SS1) for the alternate charging and discharging an electric charge store (C27) that can be connected to the microcontroller (MC), control means for this device (SQ1, SS1) for controlling the charging and discharging operations, and an evalutor for evaluating the time periods which are needed for the individual charging and discharging operations to generate pulse-width modulated or frequency modulated control signals. The microcontroller (MC) generates finely graduated, frequency modulated or pulse-width modulated control signals which are independent of the operating cycle frequency of the microcontroller (MC).