Light tube circuit for switching between emergency lighting and general lighting

A light tube circuit for switching between emergency lighting and general lighting, comprising a main control module, wherein the main control module has a terminal connected to a mains supply and a battery, as well as a terminal connected to a light-emitting element;

• the main control module is used for determining whether an input voltage of the mains supply satisfies a desired driving requirement;
• if so, the main control module controls the light-emitting element to start in a general lighting mode;
• if not, the control module controls the light-emitting element to start in an emergency lighting mode with the battery as a driving power supply;
• wherein a rectifier module is arranged between the main control module and the mains supply and is used for converting the voltage of the mains supply into a driving voltage suitable for the light-emitting element;
• wherein the main control module comprises a main control chip, the rectifier module comprises a transformer and a transformer chip, an output terminal of the mains supply and a regulation pin of the transformer chip are both connected to a first transformer coil TIA of the transformer, and a second transformer coil of the transformer is coupled to a first driving control pin of the main control chip.