Digital control circuit of an operating device for lamps

摘要

The invention relates to an integrated digital control circuit for an operating device for lamps, comprising: an output for the pulsing of switches of a half-bridge circuit having an adjustable frequency, wherein a load circuit comprising the lighting devices may be connected to the half-bridge circuit, an input, to which a signal may be selectively supplied, said signal reflecting the current through the half-bridge or the current through the lamp. The input is internally branched into two analysis branches, the outputs of which are combined using a logic member, the output of which is connected in turn to a controller for adjusting the frequency of the half-bridge actuating signal.

主权项

1. Control circuit for an operating device for lighting means, comprising an output for outputting a control signal for the lighting means operation, and an input for a signal, wherein:
the input is internally connected to at least two parallel evaluation branches having outputs being supplied to a regulating module as an actual value signal feedback, the regulating module uses this actual value signal feedback and a desired value to determine a control value and outputs it at the output of the control circuit as an actuating signal, each of the parallel evaluation branches is designed for the purpose of performing an evaluation of the signal with the aid of different sets of criteria, and the sets of criteria are selected in such a manner that only one set of criteria is continuously fulfilled for each permissible signal type of the input, so that only one evaluation branch makes a contribution which varies with respect to time to the actual value signal for the regulating module, whereas the other evaluation branches never make a contribution or continuously make a contribution which is constant with respect to time.