Voltage supply arrangement and method for supplying voltage to an electrical load with transistor saturation control

摘要

A voltage supply arrangement for driving an electrical load, particularly a light-emitting diode, comprises a driver circuit (11). The driver circuit (11) features a driver output (12) for making available a driver signal (SB) for controlling a load path (34) that comprises a means (36) for connecting the electrical load (37). The driver circuit (11) furthermore comprises a device (13) for determining an AC signal component of the driver signal (SB), the input side of which is coupled to the driver output (12) and at the output side of which can be tapped a measurement signal (SI) that is dependent on the AC signal component of the driver signal (SB) and according to which a supply voltage (VOUT) of the load path (34) can be adjusted.

主权项

1. A voltage supply arrangement for driving an electrical load, particularly a light-emitting diode, comprising a driver circuit with
a driver output for making available a driver signal for controlling a load path that comprises a means for connecting the electrical load, with the driver signal controlling a load current flowing through the load path and having an AC signal component, and a device for determining the AC signal component of the driver signal, the input side of which is coupled to the driver output and at the output side of which can be tapped a measurement signal that is dependent on the AC signal component of the driver signal, with a supply voltage of the load path being adjustable according to said measurement signal, wherein the voltage supply arrangement comprises a voltage regulator that is implemented in the form of a DC/DC converter and delivers the supply voltage to the load path with a ripple.