Linear post-regulator

Abstract

The invention describes a linear post-regulator (1) realized for use in an LED lighting arrangement (2), which linear post-regulator (1) comprises a control loop cascade (L1, L2, L3) realized for connection between a terminal of an LED lighting load (20) and a power converter (21) of the LED lighting arrangement (2); a transistor (Q) realized to regulate an LED current (ILED) through the LED lighting load (20); a first input (11) for connection to a reference current input (Iref); a second input (12) for connection to a performance parameter input (Vref, Δlref); and an output for connecting a power control output (Pctr) of the linear post-regulator (1) to the power converter (21); wherein the control loop cascade (L1, L2, L3) comprises at least two interconnected control loops (L1, L2, L3) to regulate the LED current (ILED) on the basis of the reference current input (Iref) and to regulate a further performance parameter of the LED lighting arrangement (2) on the basis of the performance parameter input (Vref, Δlref). The invention also describes an LED lighting arrangement (2), and a method of post-regulating the current of an LED lighting load (20) of an LED lighting arrangement (2).

Dependencies are inferred from the claim text.