Single chip - ballast - control with power factor correction -

摘要

An integrated circuit for an electronic ballast - control system, comprising:a half bridges - a control circuit for driving a power - half-bridge in the electronic ballast;a ballast - a control circuit, coupled to the half bridges - a control circuit and is operable for providing signals at the half bridges - a control circuit for controlling the operation of the half-bridges - control circuit;an input, the with the ballast - controlled circuit is coupled to and is indicative of at least one state of a power which is provided to the electronic ballast, and a state of an electronic ballast - load;wherein the ballast - a control circuit the half-bridges - a control circuit controls based on the input;a power factor - a control circuit, coupled to the ballast - a control circuit and operable to control of the ballast - power, in order to allow for an improved power factor - correction to achieve for the ballast.