A control arrangement (300; 1000) for a SMPS, the control arrangement (300; 1000) comprising: a current mirror comprising: an input terminal configured to receive an optocoupler-phototransistor current; and an output terminal configured to provide a feedback-signal (304, 448) derived from the optocoupler-phototransistor current and representative of an output of the SMPS; a normal-mode-processing-arrangement (316; 1016) configured to process the feedback-signal and provide a normal-mode-control-signal (320; 1020) for operating the SMPS in a normal mode of operation; a burst-mode-processing-arrangement (318; 1018) configured to process the feedback-signal and provide a burst-mode-control-signal (322; 1022) for operating the SMPS in a burst mode of operation; and a feedback-control-processing-arrangement (310a, 310b) configured to operate the SMPS such that the feedback signal (304, 448) in the normal mode of operation has a predetermined relationship with a level of the feedback signal that is used to transition to the burst mode of operation, wherein the predetermined relationship is a fixed / constant difference; and wherein the control arrangement is configured: to regulate the optocoupler-phototransistor current to a fixed level in steady state, and to split the feedback signal into signals supplied to respectively the normal-mode-processing-arrangement and the burst-mode-processing-arrangement, wherein a setting of the burst-mode-processing-arrangement is configured such that a level of the burst-mode-reference-signal is directly related to the optocoupler current, and the normal-mode-processing-arrangement is configured such that a relationship between the normal-mode-reference-signal and the burst mode-reference-signal is a fixed/constant difference that corresponds to the fixed/constant difference between the feedback signal in the normal mode of operation and the level of the feedback signal that is used to transition to the burst mode of operation. a current mirror comprising: an input terminal configured to receive an optocoupler-phototransistor current; and an output terminal configured to provide a feedback-signal (304, 448) derived from the optocoupler-phototransistor current and representative of an output of the SMPS; an input terminal configured to receive an optocoupler-phototransistor current; and an output terminal configured to provide a feedback-signal (304, 448) derived from the optocoupler-phototransistor current and representative of an output of the SMPS; a normal-mode-processing-arrangement (316; 1016) configured to process the feedback-signal and provide a normal-mode-control-signal (320; 1020) for operating the SMPS in a normal mode of operation; a burst-mode-processing-arrangement (318; 1018) configured to process the feedback-signal and provide a burst-mode-control-signal (322; 1022) for operating the SMPS in a burst mode of operation; and a feedback-control-processing-arrangement (310a, 310b) configured to operate the SMPS such that the feedback signal (304, 448) in the normal mode of operation has a predetermined relationship with a level of the feedback signal that is used to transition to the burst mode of operation, wherein the predetermined relationship is a fixed / constant difference; and wherein the control arrangement is configured: to regulate the optocoupler-phototransistor current to a fixed level in steady state, and to split the feedback signal into signals supplied to respectively the normal-mode-processing-arrangement and the burst-mode-processing-arrangement, wherein a setting of the burst-mode-processing-arrangement is configured such that a level of the burst-mode-reference-signal is directly related to the optocoupler current, and the normal-mode-processing-arrangement is configured such that a relationship between the normal-mode-reference-signal and the burst mode-reference-signal is a fixed/constant difference that corresponds to the fixed/constant difference between the feedback signal in the normal mode of operation and the level of the feedback signal that is used to transition to the burst mode of operation. to regulate the optocoupler-phototransistor current to a fixed level in steady state, and to split the feedback signal into signals supplied to respectively the normal-mode-processing-arrangement and the burst-mode-processing-arrangement, wherein a setting of the burst-mode-processing-arrangement is configured such that a level of the burst-mode-reference-signal is directly related to the optocoupler current, and the normal-mode-processing-arrangement is configured such that a relationship between the normal-mode-reference-signal and the burst mode-reference-signal is a fixed/constant difference that corresponds to the fixed/constant difference between the feedback signal in the normal mode of operation and the level of the feedback signal that is used to transition to the burst mode of operation.