Current sink with parallel load for an led chain

Abstract

A current sink (22) contains two supply poles (28a,b) for a continuous DC voltage (UG) and a current path (30) connecting said supply poles that, during operation (B), carries a total current (IG), the following being connected in series in the current path (30): a connection (32) for the LED chain (20) and a controllable resistor element (42) comprising a parallel circuit comprising load paths (46a-d), each of which comprises a series connection comprising a load resistor (44a-d) and a switch (40a-d), and a control unit (60) in order to take the measurement voltage (UM) as a basis for controlling the switches (40a-d) in such a way that a predeterminable total current (IG) and a predeterminable element voltage (UE) across the resistor element (42) are obtained in the current path (30). A light source (6) for a light device (4) of an aircraft (2) contains the current sink (22) and the LED chain (20) connected to the connection (32). A light device (4) for an aircraft (2) contains at least one light source (6a-c).

Dependencies are inferred from the claim text.