Motor vehicle illumination device

Abstract

A motor vehicle lighting device, comprising at least one branch (1) of semiconductor light sources which includes two or more light source units (LED1 to LED4) connected in series, wherein a MOSFET switch (2-1 to 2-4) bridging the individual light source units is assigned to these, the at least one branch is fed from the output voltage (UA) of a DC/DC converter (3) with respect to ground, wherein an activation circuit (4-1 to 4-4) is assigned to each MOSFET switch for activating the same, wherein each MOSFET switch (2-1 to 2-4) is a p-channel MOSFET, a rectifier circuit (5) is assigned to the DC/DC converter (3), the input of the rectifier circuit being connected to a pole of a storage inductor (L2) of the converter, at which negative voltage pulses occur with respect ground, and the rectifier circuit (5) is designed to rectify the negative pulses and to provide the resulting negative DC voltage (US) of the activation circuit (4-1 to 4-4) for switching the respective MOSFET.

Dependencies are inferred from the claim text.