Protective circuit for drive and/or driver unit of discharge lamp, has protective unit to receive and transfer disturbing condition signals to control units, such that control circuit effects break of current output to terminals of lamp

摘要

The circuit has a discharge lamp with two input terminals, and a current control circuit with two transformation units, which are in front connected with a control units (54, 56). A current protection mechanism with two separate protective units (80, 82) in high voltage output regions. The protective unit receives disturbing condition signals produced in the output regions and transfers the signals to the control units, such that the control circuit effects a complete or preliminary break of the current output to the terminals.