Ballast for gas discharge lamp, has control circuit determining output signal by heating power transferred to heating circuit depending on straight line in regulation circuit and adjusting frequency of timing of inverter

摘要

The ballast has a load circuit at which a gas discharge lamp is attached, where the load circuit is provided with a clocked inverter. A heating circuit is provided for heating coils of the gas discharge lamp. A control circuit controls the heating circuit and the inverter. The control circuit determines an output signal by heating power transferred to the heating circuit depending on a straight line in a regulation circuit, and adjusts frequency of timing of the inverter. The heating circuit comprises a primary switch pulse width modulation clocked transformer. Independent claims are also included for the following: (1) a method for controlling heating power in a heating circuit for a gas discharge lamp (2) a microcontroller or an application-specific integrated circuit for executing a method for controlling heating power in a heating circuit for a gas discharge lamp.