Device for supplying a plurality of LED units with power

摘要

A device for supplying a plurality of LED units with power includes a common DC/DC converter which delivers a regulated output voltage and to which a plurality of sections are connected, each having a buck converter and an LED unit connected thereto, and means for regulating or setting the section currents to be supplied to the LED units. In order to simplify the device, the means for regulating or setting the section currents are formed by a central, common processor, which is supplied with actual values in keeping with the individual section currents and connected to corresponding control inputs of the respective buck converters for applying control values calculated on the basis of the actual values.

主权项

1. A device for supplying power to a plurality of LED units, comprising:
a common DC/DC converter that outputs a regulated output voltage; a plurality of sections connected to the common DC/DC converter, each section having a buck converter and an LED unit connected thereto; and a central, common processor configured to regulate section currents supplied to the LED units, by:
receiving actual values corresponding to the individual section currents;calculating control values based on the received actual values; andapplying the calculated control values to the respective buck converters via corresponding control inputs of the respective buck converters; wherein at least one LED unit has a section voltage, at operating current, which is at or below a minimum input voltage of the DC/DC converter, as a result of which emergency lighting is implemented in the event of failure of the DC/DC converter.